
| RI Group | Country | 1973 | 1977 | 1978 | 1979 | 1980 | 1981 | 1982 | 1983 | 1984 | 1985 | 1986 | 1987 | 1988 | 1989 | 1990 | 1991 | 1992 | 1993 | Avg |
| | | | | | | | | | | | | | | | | | | | 1960–1993 |
| 2 | Zambia | 903 | 975 | 1324 | 1155 | 1140 | 1136 | 889 | 960 | 960 | 1105 | 1108 | 933 | 976 | 1168 | 1030 | 954 | 716 | 1037 | 1062 |
| Malawi | 889 | 1007 | 1053 | 962 | 973 | 998 | 1059 | 922 | 999 | 1330 | 1369 | 1005 | 1022 | 1305 | 975 | 951 | 542 | 1106 | 1011 |
| Mozambique | 865 | 995 | 1139 | 1100 | 902 | 1038 | 1092 | 858 | 1080 | 1094 | 1155 | 889 | 958 | 1094 | 1024 | 767 | 686 | 1026 | 1027 |
| Zimbabwe | 499 | 901 | 1138 | 708 | 769 | 1088 | 600 | 538 | 596 | 954 | 896 | 520 | 901 | 751 | 798 | 594 | 403 | 759 | 771 |
| Namibia | 356 | 561 | 673 | 358 | 484 | 416 | 331 | 377 | 519 | 406 | 383 | 370 | 515 | 784 | 501 | 420 | 376 | | 478 |
| 5 | South Africa | 875 | 1076 | 1161 | 921 | 1018 | 1106 | 966 | 960 | 1046 | 571 | 626 | 743 | 983 | 744 | 672 | 623 | 657 | 540 | 910 |
| Swaziland | 1359 | 927 | 1122 | 800 | 880 | 1097 | 854 | 696 | 1389 | 1048 | 818 | 687 | 1093 | 1121 | 906 | 648 | 372 | | 922 |
| Lesotho | 470 | 666 | 765 | 392 | 647 | 656 | 556 | 624 | 688 | 515 | 781 | 1105 | 817 | 797 | 728 | 694 | 556 | 641 | 674 |
| Botswana | 274 | 587 | 747 | 433 | 489 | 584 | 314 | 344 | 323 | 334 | 318 | 342 | 634 | 485 | 376 | 396 | 282 | 337 | 466 |
| 3 | Tanzania | 1118 | 953 | 1104 | 1097 | 913 | 984 | 888 | 1202 | 963 | 1016 | 1015 | 1174 | 1076 | 1290 | 1226 | 1124 | 1074 | 997 | 1063 |
| 7 | Angola | 1134 | | | | | | Not available | | 1155 |
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