Year | Value | 2021 | 44.891900399887 | 2020 | 45.850583377412 | 2019 | 41.292365661341 | 2000 | 18.191863336612 | 1999 | 19.478524462819 | 1998 | 21.008217378995 | 1997 | 19.740505270762 | 1996 | 23.932346834464 | 1995 | 30.743498891932 | 1994 | 26.843881399672 | 1993 | 19.244173330861 | 1992 | 28.147054023813 | 1991 | 38.218236485497 | 1990 | 46.626857393483 |
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