Year	Total
1985	34925000
1986	32335000
1987	28995000
1988	26389000
1989	25086000
1990	22887000
1991	19873000
1992	17104000
1993	15638000
1994	14824000
1995	14824000
1996	14987000
1997	15209000
1998	14635000
1999	14752000
2000	14566000
2001	14905000
2002	15312000
2003	15801000
2004	16534000
2005	16697000
2006	16860000
2007	16860000
2008	17104000
2009	17348000
2010	16664000
2011	16860000
2012	16697000
2013	17348000
2014	16371000
2015	16127000
2016	16000000