Year	Total
1981	603.9
1982	637.5
1983	638.3
1984	650.5
1985	691.9
1986	739
1987	725.8
1988	868.3
1989	914.5
1990	910.5
1991	935.7
1992	1039
1993	1051
1994	1067
1995	1059
1996	973.1
1997	991.7
1998	1115
1999	1125
2000	1127
2001	1116
2002	1119
2003	1028
2004	1018
2005	1063
2006	1055
2007	979.2
2008	1037
2009	938.1