Newer
Older
PERIOD VALUE
1975 1298
1976 1455
1977 1783
1978 2475
1979 3085
1980 3529
1981 2550
1982 451
1983 589
1984 728
1985 986
1986 974
1987 1142
1988 1172
1989 662
1990 547
1991 768
1992 775
1993 1790
1994 2668
1995 3329
1996 3186
1997 4134
1998 4295
1999 4326
2000 4108
2001 4266
2002 4270