Year	Number
1972	10642933
1973	10772419
1974	10957781
1975	10840949
1976	10738557
1977	10677665
1978	10686393
1979	10740406
1980	10652704
1981	10666873
1982	11072652
1983	11202713
1984	11593570
1985	11954827
1986	12340543
1987	12956242
1988	13454363
1989	14179793
1990	14932181
1991	15071678
1992	15808456
1993	16374070
1994	16514108
1995	15967946
1996	16266082
1997	15689947
1998	16100105
1999	16716504
2000	16268855
2001	15698114
2002	14717079
2003	13983817
2004	13404498
2005	12580184
2006	11822557
2007	11198240
2008	9975283
2009	10173041
2010	10600000
2011	10200000
2012	10200000
2013	9971523
2014	9817754
2015	10100000
2016	10100000
2017	10000000
2018	10500000