Year	Number
1996	35.5
1998	32.8358192443848
2000	22.8855724334717
2002	26.8656711578369
2003	27.8606967926025
2004	25.9615383148193
2005	27.4038467407227
2006	31.730770111084
2007	34.6153831481934
2008	36.0576934814453
2009	36.4928894042969
2010	36.4928894042969
2011	37.5586853027344
2012	37.0892028808594
2013	38.0281677246094
2014	37.4384231567383
2015	36.4532012939453
2016	37.4384231567383
2017	37.9310340881348
2018	37.8640785217285
2019	39.1304359436035
2020	39.1304359436035
2021	38.6473426818848
2022	39.1304359436035