- 1978 to 19797,358
- 1980 to 19813,339
- 1982 to 19844,299
- 1985 to 19864,879
- 1987 to 19894,429
- 1990 to 19911,716
- 1992 to 19942,367
- 1995 to 19962,628
- 1997 to 19992,886
- 20001,094
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