| Year | Group-wise between-group inequality componentsa | |||||
| Africa | Asia & Oceania | Central & South America | Europe | Middle East | North America | |
| 1990 | 0.16613 | 0.07767 | 0.00684 | 0.00861 | 0.04926 | 0.05386 |
| 1991 | 0.16431 | 0.07353 | 0.00757 | 0.00838 | 0.05006 | 0.05132 |
| 1992 | 0.16263 | 0.07000 | 0.00860 | 0.00812 | 0.05148 | 0.04939 |
| 1993 | 0.15195 | 0.06664 | 0.00915 | 0.00786 | 0.05361 | 0.04726 |
| 1994 | 0.14390 | 0.06410 | 0.00978 | 0.00761 | 0.05581 | 0.04536 |
| 1995 | 0.13637 | 0.06079 | 0.01039 | 0.00735 | 0.05834 | 0.04324 |
| 1996 | 0.13003 | 0.05508 | 0.01103 | 0.00699 | 0.06027 | 0.04170 |
| 1997 | 0.12427 | 0.05072 | 0.01172 | 0.00677 | 0.06229 | 0.03954 |
| 1998 | 0.11921 | 0.04643 | 0.01203 | 0.00652 | 0.06405 | 0.03738 |
| 1999 | 0.11556 | 0.04254 | 0.01288 | 0.00621 | 0.06597 | 0.03581 |
| 2000 | 0.11262 | 0.03906 | 0.01379 | 0.00587 | 0.06785 | 0.03364 |
| 2001 | 0.10999 | 0.03543 | 0.01364 | 0.00557 | 0.06971 | 0.03243 |
| 2002 | 0.10828 | 0.03251 | 0.01416 | 0.00527 | 0.07181 | 0.03025 |
| 2003 | 0.10660 | 0.02986 | 0.01462 | 0.00481 | 0.07320 | 0.02808 |