Year	Total
1997	599508000
1998	642330000
1999	636624000
2000	633771000
2001	633771000
2002	633771000
2003	630909000
2004	633771000
2005	628056000
2006	626904000
2007	626904000
2008	614727000
2009	602559000
2010	589500000
2011	588600000
2012	578457000
2013	566316000
2014	554616000
2015	543276000
2016	531819000