For each series the beginning year is 1870 and the end is 1991 Missing obs are -999 pig iron 33.25 35.12 48.87 42.75 30.25 25.50 22.25 18.87 17.62 21.50 28.50 25.12 25.75 22.37 19.87 18.00 18.71 20.92 18.88 17.75 18.40 17.52 15.75 14.52 12.66 13.10 12.95 12.10 11.66 19.36 19.98 15.87 22.19 19.92 15.57 17.88 20.98 23.89 15.21 15.52 14.73 13.10 13.90 14.77 12.89 13.78 19.87 39.10 32.50 27.49 42.05 21.87 23.98 25.71 20.23 19.59 18.55 17.71 16.56 18.20 17.99 15.88 14.25 15.44 17.70 18.17 19.10 22.99 21.71 21.10 22.50 23.50 23.50 23.50 23.50 24.52 27.13 33.82 41.60 46.00 47.04 52.00 53.08 55.25 56.00 57.20 60.69 64.83 66.00 66.00 66.00 66.00 65.50 63.00 63.00 63.00 63.00 63.00 63.00 64.09 69.69 77.42 82.22 79.82 124.81 181.00 181.00 184.03 190.00 190.00 200.83 209.67 213.00 213.00 213.00 213.00 -999 -999 -999 -999 -999 -999 aluminum -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 .587 .507 .390 .306 .327 .327 .330 .330 .330 .350 .350 .358 .450 .287 .220 .223 .201 .220 .236 .186 .340 .607 .516 .335 .321 .327 .221 .187 .254 .270 .272 .270 .254 .243 .243 .238 .233 .233 .233 .234 .200 .205 .199 .200 .200 .187 .165 .150 .150 .150 .150 .150 .150 .157 .170 .177 .190 .194 .209 .218 .237 .240 .254 .248 .247 .260 .255 .239 .226 .237 .245 .245 .250 .256 .272 .287 .290 .250 .264 .431 .348 .412 .478 .510 .707 .761 .598 .468 .683 .611 .488 .559 .723 1.101 .878 .740 .595 copper 21.20 24.10 35.60 28.00 22.00 22.70 21.00 19.00 16.60 18.60 21.40 19.20 19.10 16.50 13.00 10.80 11.10 13.80 16.80 13.50 15.60 12.80 11.60 10.80 9.50 10.70 10.80 11.29 12.03 16.70 16.19 16.10 11.00 13.20 12.80 15.60 19.30 20.00 13.20 13.11 12.88 12.55 16.48 15.52 13.31 17.47 28.46 29.19 24.68 18.19 17.50 12.65 13.55 14.75 13.28 14.30 14.05 13.05 14.81 18.35 13.23 8.37 5.79 7.28 8.66 8.88 9.71 13.39 10.22 11.20 11.53 12.00 12.00 12.00 12.00 12.00 14.04 21.27 22.32 19.50 21.58 24.50 24.50 29.05 29.94 37.51 42.00 30.17 26.31 30.99 32.34 30.32 31.00 31.00 32.35 35.36 36.00 38.10 41.17 47.43 58.07 52.09 51.44 59.49 77.27 64.16 69.59 66.77 65.81 92.19 101.31 84.21 72.80 76.53 66.85 66.97 66.05 82.50 120.51 130.95 123.16 109.33 lead 6.2 6.1 6.3 6.3 6.0 5.8 6.1 5.5 3.6 4.1 5.0 4.8 4.9 4.3 3.7 3.9 4.6 4.5 4.4 3.9 4.5 4.3 4.1 3.7 3.3 3.2 3.0 3.6 3.8 4.5 4.4 4.4 4.1 4.3 4.3 4.7 5.7 5.3 4.2 4.3 4.5 4.5 4.5 4.4 3.9 4.7 6.8 8.7 7.5 5.8 8.1 4.5 5.7 7.2 8.1 9.0 8.4 6.7 6.3 6.8 5.5 4.2 3.2 3.9 3.9 4.1 4.7 6.0 4.7 5.0 5.2 5.8 6.5 6.5 6.5 6.5 8.1 14.7 18.0 15.4 13.3 17.5 16.5 13.5 14.0 15.1 16.0 14.7 12.1 12.2 12.0 10.9 9.6 11.1 13.6 16.0 15.1 14.0 13.2 14.9 15.7 13.9 15.4 16.3 22.5 21.5 23.1 30.7 33.7 52.6 42.5 36.5 25.5 21.7 25.5 19.1 21.1 35.9 37.1 -999 -999 -999 zinc 7.0 7.0 7.0 8.6 7.0 7.0 7.2 6.0 4.9 5.2 5.5 5.2 5.3 4.5 4.4 4.3 4.4 4.6 4.9 5.0 5.6 5.0 4.6 4.1 3.5 3.6 3.9 4.1 4.6 5.8 4.4 4.1 4.9 5.6 5.2 6.0 6.3 6.2 4.7 5.5 5.7 5.9 7.1 5.8 5.3 14.4 1.4 9.1 8.3 7.4 8.1 5.2 6.1 7.0 6.7 8.0 7.7 6.6 6.4 6.8 4.9 4.8 3.3 4.4 4.5 4.7 5.3 6.9 5.0 5.5 6.7 7.9 8.7 8.7 8.6 8.6 9.1 11.0 14.2 12.9 14.6 18.8 17.0 11.5 11.2 12.8 14.0 11.9 10.8 12.0 13.5 12.1 12.1 12.5 14.1 15.0 15.0 14.4 14.0 15.2 15.8 16.1 17.7 20.8 36.0 38.9 37.5 34.4 31.0 37.3 37.4 44.6 38.5 41.4 48.6 40.4 38.0 41.9 60.2 82.1 74.6 52.8 silver -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 58.96 52.16 53.59 57.22 60.35 66.79 65.32 52.80 51.50 53.49 53.3 60.83 59.80 54.81 49.69 65.66 81.42 96.77 111.12 100.90 62.65 67.52 64.87 66.78 69.07 62.11 56.37 58.18 52.99 38.15 28.70 27.89 34.73 47.97 64.27 45.09 44.88 43.22 39.08 34.77 34.78 38.33 44.75 44.75 51.93 80.15 71.82 74.36 71.93 74.17 89.37 84.94 85.19 85.25 89.10 90.83 90.82 89.04 91.2 91.37 92.45 108.37 127.91 129.30 129.30 129.30 154.97 214.60 214.00 177.08 154.56 168.45 255.76 470.80 441.85 435.35 462.30 540.02 1108.97 2940.0 1048.09 795.03 1143.93 814.07 614.22 547.00 700.85 653 550 482 404 petrol 3.86 4.34 3.64 1.83 1.17 1.35 2.52 2.38 1.17 0.86 0.94 0.92 0.78 1.10 0.85 0.88 0.71 0.67 0.65 0.77 0.77 0.56 0.51 0.60 0.72 1.09 0.96 0.68 0.80 1.13 1.19 0.96 0.80 0.94 0.86 0.62 0.73 0.72 0.72 0.70 0.61 0.61 0.74 0.95 0.81 0.64 1.10 1.56 1.98 2.01 3.07 1.73 1.61 1.34 1.43 1.68 1.88 1.30 1.17 1.27 1.19 0.65 0.87 0.67 1.00 0.97 1.09 1.18 1.13 1.02 1.02 1.14 1.19 1.20 1.21 1.22 1.41 1.93 2.60 2.54 2.51 2.53 2.53 2.68 2.77 2.77 2.79 3.09 3.01 2.90 2.88 2.89 2.90 2.89 2.88 2.86 2.88 2.92 2.94 3.09 3.18 3.39 3.39 3.89 6.74 7.67 8.14 8.57 9.00 12.6 21.6 31.8 28.5 26.2 25.9 24.1 12.5 15.4 12.6 15.9 20.0 16.5 coal -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 1.25 1.12 1.12 1.07 0.94 1.13 1.05 1.11 1.00 0.99 0.99 0.99 0.99 0.96 0.91 0.86 0.83 0.81 0.80 0.87 1.04 1.05 1.12 1.24 1.10 1.06 1.11 1.14 1.12 1.07 1.12 1.11 1.15 1.18 1.17 1.13 1.32 2.26 2.58 2.49 3.75 2.89 3.02 2.68 2.20 2.04 2.06 1.99 1.86 1.78 1.70 1.54 1.31 1.34 1.75 1.77 1.76 1.94 1.95 1.84 1.91 2.19 2.36 2.69 2.92 3.06 3.44 4.16 4.99 4.88 4.84 4.92 4.90 4.92 4.52 4.50 4.82 5.08 4.86 4.77 4.69 4.58 4.48 4.39 4.45 4.44 4.54 4.62 4.67 4.99 6.26 7.07 7.66 8.53 15.75 19.23 19.43 19.82 21.78 23.7 24.5 26.3 27.1 25.9 25.5 25.1 23.7 23.0 22.0 21.8 21.7 21.8 natural gas -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 8.3 9.4 10.1 11.1 10.0 9.3 9.4 9.5 8.8 8.9 8.2 7.6 7.0 6.4 6.2 6.0 5.8 5.5 5.1 4.9 4.9 4.5 4.9 5.1 5.2 5.1 4.9 5.3 6.0 6.5 6.3 6.5 7.3 7.8 9.2 10.1 10.4 10.8 11.3 11.9 12.9 14.0 15.1 15.5 15.9 15.4 15.6 15.7 16.0 16.4 16.7 17.1 18.2 18.6 21.6 30.4 44.5 58.0 79.0 90.5 117.8 160.3 198.0 246.0 259 266 251 194 167 169 169 171 159 cpi 38 36 36 36 34 33 32 32 29 28 29 29 29 28 27 27 27 27 27 27 27 27 27 27 26 25 25 25 25 25 25 25 26 27 27 27 27 28 27 27 28 28 29 29.7 30.1 30.4 32.7 38.4 45.1 51.8 60.0 53.6 50.2 51.1 51.2 52.5 53.0 52.0 51.3 51.3 50.0 45.6 40.9 38.8 40.1 41.1 41.5 43.0 42.2 41.6 42.0 44.1 48.8 51.8 52.7 53.9 58.5 66.9 72.1 71.4 72.1 77.8 79.5 80.1 80.5 80.2 81.4 84.3 86.6 87.3 88.7 89.6 90.6 91.7 92.9 94.5 97.2 100.0 104.2 109.8 116.3 121.3 125.3 133.1 147.7 161.2 170.5 181.5 195.4 217.4 246.8 272.4 289.1 298.4 311.1 322.2 328.4 340.4 354.2 -999 -999 -999 ppi 44.8 42.7 43.6 43.2 41.7 40.1 37.1 34.8 31.8 30.3 33.6 33.3 34.1 33.3 31.2 29.2 28.9 29.1 29.6 29.6 29.0 28.8 26.8 27.5 24.7 25.2 23.9 24.0 25.0 26.9 28.9 28.5 30.4 30.7 30.8 31.0 32.0 33.6 32.4 34.9 36.4 33.5 35.6 36.0 35.2 35.8 44.1 60.6 67.6 71.4 79.6 50.3 49.9 51.9 50.3 53.3 51.6 49.3 50.0 49.1 44.6 37.6 33.6 34.0 38.6 41.3 41.7 44.5 40.5 39.8 40.5 45.1 50.9 53.3 53.6 54.6 62.3 76.5 82.8 78.7 81.8 91.1 88.6 87.4 87.6 87.8 90.7 93.3 94.6 94.8 94.9 94.5 94.8 94.5 94.7 96.6 99.8 100.0 102.5 106.5 110.4 114.1 119.2 134.7 160.2 174.9 182.9 194.3 209.3 235.6 268.9 293.4 299.4 303.3 310.5 309.0 300 307.8 320.1 335.9 348.2 348.8