Year	Number
1995	14193466.931805676
1996	16049754.025331588
1997	16643490.66039536
1998	17777716.281703483
1999	19153012.32653074
2000	19437981.380174156
2001	20377864.549196888
2002	22023890.382242594
2003	22796021.35522792
2004	24570128.188448586
2005	26229482.297248088
2006	29607860.52354995
2007	34490086.89441564
2008	35560286.30261624
2009	36521793.40136198
2010	40138969.92843513
2011	40525618.32022657
2012	42980384.60133041
2013	44484730.55130008
2014	46265055.584042154
2015	48672074.10386219
2016	50877194.3830237
2017	52496629.85747189
2018	56247033.37360386
2019	55555231.29541253