Year	Number
1996	75.5
1998	74.6268692016602
2000	75.1243743896484
2002	74.1293563842773
2003	76.6169128417969
2004	82.211540222168
2005	73.0769195556641
2006	73.5576934814453
2007	74.038459777832
2008	74.5192337036133
2009	74.8815155029297
2010	72.9857788085938
2011	74.6478881835938
2012	73.2394332885742
2013	71.3615036010742
2014	70.9359588623047
2015	72.4137954711914
2016	71.9211807250977
2017	73.8916244506836
2018	74.7572784423828
2019	73.4299545288086
2020	72.4637680053711
2021	72.4637680053711
2022	71.4975814819336