Year | Greece | Japan | Liberia 1 | Liberia 2 | Norway | UK | USA |
1977 | $292 = 100 | 528 = 181 | 531 = 182 | - | 802 = 275 | 295 = 101 | 804 = 275 |
1978 | 381 = 130 | 534 = 183 | 579 = 198 | - | 829 = 284 | 360 = 123 | 865 = 296 |
1979 | $425 = 100 | 590 = 139 | 621 = 146 | 440 = 103 | 900 = 212 | 400 = 94 | 1022 = 240 |
1980 | 436 = 103 | 693 = 163 | 674 = 159 | 478 = 112 | 947 = 223 | 567 = 133 | 1060 = 249 |
1981 | 428 = 101 | 758 = 178 | 684 = 161 | 499 = 117 | 869 = 204 | 545 = 128 | 1081 = 254 |
1982 | 455 = 107 | 752 = 177 | 780 = 183 | 554 = 130 | 877 = 206 | 559 = 131 | 1294 = 304 |
1983 | 445 = 105 | 784 = 184 | 821 = 193 | - | 888 = 209 | 516 = 121 | 1323 = 311 |
1984 | 396 = 93 | 777 = 183 | 821 = 193 | - | 764 = 180 | 449 = 106 | 1448 = 341 |