Year	Number
1996	16.5
1998	13.4328355789185
2000	12.93532371521
2002	21.3930339813232
2003	32.3383102416992
2004	34.1346168518066
2005	33.6538467407227
2006	36.538459777832
2007	34.1346168518066
2008	32.6923065185547
2009	30.3317527770996
2010	34.5971565246582
2011	31.9248828887939
2012	34.2723007202148
2013	35.6807518005371
2014	35.9605903625488
2015	35.9605903625488
2016	35.4679794311523
2017	34.4827575683594
2018	30.5825233459473
2019	31.8840579986572
2020	32.8502426147461
2021	32.8502426147461
2022	35.2657012939453