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1981
1
1982
to
1984
12
1985
to
1986
3
1987
to
1989
3
1990
to
1991
2
1992
to
1994
2
1995
to
1996
2
1997
to
1999
1
2000
to
2001
0
2002
to
2004
0
2005
1