| Gold | Silver | platinum | gold/silver | platin/gold | |
| 1833 | 21 | 1.29 | 16 | - | |
| 1934 | 35 | 0.54 | 65 | - | |
| 1960 | 35 | 0.19 | 83 | 184 | 2.4 |
| 61 | 35 | 1.03 | 84 | 34 | 2.4 |
| 62 | 35 | 1.2 | 84 | 29 | 2.4 |
| 63 | 35 | 1.29 | 81 | 27 | 2.3 |
| 64 | 35 | 1.29 | 88 | 27 | 2.5 |
| 65 | 35 | 1.29 | 98 | 27 | 2.8 |
| 66 | 35 | 1.29 | 100 | 27 | 2.9 |
| 67 | 35 | 2.06 | 110 | 17 | 3.1 |
| 68 | 39 | 1.96 | 256 | 20 | 6.6 |
| 69 | 41 | 1.81 | 202 | 23 | 4.9 |
| 1970 | 35 | 1.64 | 152 | 21 | 4.3 |
| 71 | 41 | 1.34 | 110 | 31 | 2.7 |
| 72 | 58 | 1.98 | 124 | 29 | 2.1 |
| 73 | 97 | 3.14 | 154 | 31 | 1.6 |
| 74 | 160 | 4.39 | 192 | 36 | 1.2 |
| 75 | 161 | 4.09 | 150 | 39 | 0.9 |
| 76 | 125 | 4.35 | 153 | 29 | 1.2 |
| 77 | 148 | 4.71 | 158 | 31 | 1.1 |
| 78 | 193 | 5.93 | 261 | 33 | 1.4 |
| 79 | 307 | 21.79 | 446 | 14 | 1.5 |
| 1980 | 612 | 16.39 | 677 | 37 | 1.1 |
| 81 | 460 | 8.43 | 446 | 55 | 1.0 |
| 82 | 376 | 10.57 | 327 | 36 | 0.9 |
| 83 | 424 | 9.12 | 423 | 46 | 1.0 |
| 84 | 360 | 6.69 | 357 | 54 | 1.0 |
| 85 | 317 | 5.89 | 291 | 54 | 0.9 |
| 86 | 368 | 5.36 | 462 | 69 | 1.3 |
| 87 | 446 | 6.79 | 553 | 66 | 1.2 |
| 88 | 437 | 6.18 | 525 | 71 | 1.2 |
| 89 | 381 | 5.54 | 507 | 69 | 1.3 |
| 1990 | 384 | 4.09 | 467 | 94 | 1.2 |
| 91 | 362 | 3.91 | 371 | 93 | 1.0 |
| 92 | 343 | 3.71 | 356 | 92 | 1.0 |
| 93 | 360 | 4.97 | 390 | 72 | 1.1 |
| 94 | 384 | 4.77 | 401 | 81 | 1.0 |
| 95 | 384 | 5.14 | 421 | 75 | 1.1 |
| 96 | 388 | 4.73 | 395 | 82 | 1.0 |
| 97 | 330 | 5.95 | 388 | 55 | 1.2 |
| 98 | 294 | 5.55 | 385 | 53 | 1.3 |
| 99 | 279 | 5.21 | 378 | 54 | 1.4 |
| 2000 | 279 | 4.95 | 544 | 56 | 1.9 |
| 1 | 271 | 4.37 | 529 | 62 | 2.0 |
| 2 | 340 | 4.5 | 539 | 76 | 1.6 |
| 3 | 363 | 4.88 | 691 | 74 | 1.9 |
| 4 | 410 | 6.67 | 845 | 61 | 2.1 |
| 5 | 435 | 7.16 | 882 | 61 | 2.0 |
| current | 472 | 7.76 | 939 | 61 | 2.0 |