Year	Number
1981	223100
1986	290600
1989	278500
1990	248600
1991	228800
1992	219300
1993	214200
1994	226000
1995	214500
1999	358771
2000	403130
2001	396968
2002	417375
2003	485347
2004	567906
2005	788033
2006	890671
2012	1599031
2013	1573906
2014	1514988
2015	1450730
2016	1394903
2017	1358064