Year	Number
1996	21.1055278778076
1998	26
2000	24.8756217956543
2002	32.3383102416992
2003	33.8308448791504
2004	33.1730766296387
2005	34.4497604370117
2006	30.6220092773438
2007	31.1004791259766
2008	34.1346168518066
2009	30.8056869506836
2010	29.8578205108643
2011	28.6384983062744
2012	31.9248828887939
2013	37.0892028808594
2014	37.980770111084
2015	38.0952377319336
2016	45.238094329834
2017	40.476188659668
2018	39.523811340332
2019	40
2020	34.761905670166
2021	40.9523811340332
2022	40.0943412780762