Year	%
1990	59.9035089497476
1991	60.5441027374113
1992	61.112780891427
1993	61.6367124394184
1994	62.108243457768
1995	62.5598411707255
1996	62.9646576207005
1997	63.532304155558
1998	63.8982492986223
1999	64.1662395750827
2000	64.423689867319
2001	64.5911017266424
2002	64.6937662809717
2003	64.7642274004788
2004	64.8097327600123
2005	64.7664043488779
2006	64.6819048149024
2007	64.5826251308758
2008	64.4134234630615
2009	64.2839287053471
2010	64.1294626670856
2011	64.1477093851661
2012	64.3337727871983
2013	64.6115647759876
2014	64.9452235586982
2015	65.3122468899919
2016	65.7431737119222
2017	66.2088360352059
2018	66.6930096213047
2019	67.2006222198918
2020	67.6737109469961
2021	68.031302599775
2022	68.3400131331658