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1978
to
1979
3
1980
to
1981
5
1982
to
1984
4
1985
to
1986
8
1987
to
1989
4
1990
to
1991
0
1992
to
1994
0
1995
to
1996
8
1997
to
1999
8
2000
to
2001
8
2002
to
2003
1