Year	%
1987	62.62110242101114
1988	66.74656707723035
1989	70.17073779182172
1990	72.04153394541252
1991	74.22645979662438
1992	75.63852440267004
1993	77.12046705308754
1994	78.26242030039796
1995	79.79054386678368
1996	80.7375981945228
1997	82.42978898744335
1998	83.35126679210607
1999	84.42695177636708
2000	85.49179849002337
2001	85.93599837111442
2002	86.0979721980089
2003	87.03033131124592
2004	87.6096041745017
2005	90.43006130646184
2006	91.9286527054836
2007	91.91207936199183
2008	91.75788632068614
2009	91.78346897996978
2010	94.55223176604935
2011	94.49320882852292
2012	94.47187507795155
2013	95.1917624763108
2014	95.81113458431713
2015	95.91327066353318
2016	95.88533782594483
2017	95.85201443023286
2018	95.83318220744547
2019	95.98612259211943
2020	97.26341338783853
2021	96.8917174796748
2022	97.24557590016367