Year	%
1990	44.7129909365559
1991	45.8920187793427
1992	46.8779123951538
1993	47.6691729323308
1994	48.3672211953173
1995	48.949256791389
1996	49.4591086109909
1997	49.870322341608
1998	50.093574547723
1999	50.2384737678855
2000	50.3396739130435
2001	50.3313766332134
2002	50.2502345949327
2003	50.1040582726327
2004	49.9338040600177
2005	49.7219025700038
2006	49.4576446280992
2007	49.1186279180562
2008	48.6597783767595
2009	48.1640541120893
2010	47.5763016157989
2011	46.9193365749684
2012	46.0724880691345
2013	44.9081907626747
2014	43.7171815850531
2015	42.8333729498455
2016	42.1077012159815
2017	41.4245336348219
2018	40.700957865013
2019	39.9652758938744
2020	39.2417213245881
2021	38.4409026353164
2022	37.7756898427455