Year	Number
1996	77.5
1998	86.5671615600586
2000	74.1293563842773
2002	72.6368179321289
2003	74.1293563842773
2004	76.4423065185547
2005	74.038459777832
2006	74.5192337036133
2007	71.6346130371094
2008	71.1538467407227
2009	70.1421813964844
2010	70.6161117553711
2011	69.9530487060547
2012	69.9530487060547
2013	69.4835662841797
2014	70.9359588623047
2015	70.9359588623047
2016	71.9211807250977
2017	73.3990173339844
2018	71.8446578979492
2019	71.9806747436523
2020	72.4637680053711
2021	74.3961334228516
2022	73.9130401611328