Year	Number
1996	35.1758804321289
1998	30
2000	26.3681583404541
2002	34.825870513916
2003	36.8159217834473
2004	36.538459777832
2005	34.9282302856445
2006	34.4497604370117
2007	36.8421058654785
2008	38.461540222168
2009	35.0710906982422
2010	31.7535552978516
2011	30.5164318084717
2012	32.3943672180176
2013	33.8028182983398
2014	32.6923065185547
2015	29.5238094329834
2016	30.9523811340332
2017	31.9047622680664
2018	32.3809509277344
2019	32.3809509277344
2020	34.761905670166
2021	35.238094329834
2022	25