Year	Number
1995	14323566.339892592
1996	16195085.056017153
1997	16782783.74093954
1998	17915072.38730256
1999	19286169.649933685
2000	19581432.375593536
2001	20519199.901892953
2002	22162330.26297617
2003	22926433.429214597
2004	24699148.82510344
2005	26367736.544280343
2006	29762488.241926093
2007	34665318.36968774
2008	35737670.05606499
2009	36704327.02142125
2010	40334502.46257172
2011	40741755.28480565
2012	43202323.0203332
2013	44728989.89684981
2014	46510985.555116385
2015	48979055.51012856
2016	51223036.38285962
2017	52899581.205879405
2018	56673405.06535894
2019	56014499.15394769