Year	Number
1996	57.5
1998	61.6915435791016
2000	53.7313423156738
2002	40.7960205078125
2003	42.7860679626465
2004	39.9038467407227
2005	38.9423065185547
2006	45.6730766296387
2007	45.6730766296387
2008	45.6730766296387
2009	48.8151664733887
2010	48.8151664733887
2011	46.948356628418
2012	48.8262901306152
2013	47.417839050293
2014	49.7536964416504
2015	54.1871910095215
2016	51.7241363525391
2017	53.2019691467285
2018	50.4854354858398
2019	49.7584533691406
2020	53.6231880187988
2021	56.038646697998
2022	56.038646697998