Year	Number
1995	18989751.299682003
1996	19305727.23673357
1997	19856169.394590918
1998	20703467.926429834
1999	23536182.139169212
2000	25303332.9136176
2001	25738554.546658374
2002	29054552.852865484
2003	30668307.008332312
2004	37545158.34004001
2005	38891162.758193895
2006	41918915.57370065
2007	44393001.400547445
2008	50073040.22708904
2009	52971338.684281245
2010	62437036.01113979
2011	49845259.01090501
2012	52940791.714461796
2013	51346515.837468304
2014	51423560.28952555
2015	46829784.8356119
2016	40984877.38790038
2017	48055307.58962304
2018	58212100.38304952
2019	65078454.60359711