Year	number
2006	53757
2007	56900
2008	51060
2009	46449
2010	54018
2011	57358
2012	42403
2013	52509
2014	60829
2015	67782
2016	64882
2017	74936
2018	86210
2019	85413
2020	101482
2021	110909
2022	142220