Year	Number
1983	500000
1984	500000
1985	500000
1986	500000
1987	500000
1988	500000
1989	500000
1990	500000
1991	500000
1992	500000
1993	500000
1994	500000
1995	500000
1996	500000
1997	500000
1998	500000
1999	500000
2000	500000
2001	860000
2002	916000
2003	980000
2004	1000000
2005	1000000
2006	1000000
2007	1180000
2008	1180000
2009	1180000
2010	1180000
2011	1180000
2012	1180000
2013	1180000
2014	1180000
2015	1180000
2016	1180000
2017	1180000
2019	1180000
2020	1180000
2021	1180000