Year	Number
2007	12709000
2008	13042000
2009	13754000
2010	14254000
2011	15944000
2012	14916000
2013	13434000
2014	13952000
2015	17625000
2016	18277000
2017	20274000
2018	22287000
2019	22816000
2020	6236000