Year	Total
1960	9371
1961	9484
1962	9727
1963	10210
1964	10600
1965	11210
1966	12230
1967	13160
1968	13540
1969	14040
1970	13990
1971	13810
1972	15120
1973	15520
1974	15890
1975	16260
1976	16610
1977	16940
1978	17610
1979	17420
1980	17140
1981	18060
1982	18960
1983	19280
1984	20250
1985	21860
1986	23510
1987	25030
1988	24800
1989	25640
1990	25810
1991	25630
1992	26350
1993	26170
1994	26300
1995	26480
1996	27120
1997	27960
1998	29070
1999	27490
2000	25860
2001	24420
2002	24110
2003	23590
2004	24110
2005	23930
2006	26350
2007	27270
2008	28980
2009	30280
2010	30290