Year	Number
1995	4398000
2004	11083000
2005	10417000
2006	10962000
2007	13479000
2008	17717000
2009	13319000
2010	13025000
2011	15776000
2012	19847000
2013	19934000
2014	23010000
2015	21834000
2016	20887000
2017	18607000
2018	17570000
2019	20292000