Year	Percent
1950	22.20857
1955	21.90173
1960	21.45798
1965	20.37485
1970	21.05513
1975	20.82008
1980	19.54371
1985	17.89776
1990	15.90083
1995	14.3655
2000	13.50309
2005	13.33322
2010	13.86611
2015	14.89807
2020	16.35205
2025	17.90694
2030	19.24564
2035	20.10289
2040	20.41254
2045	20.4296
2050	20.81625
2055	21.91959
2060	23.10556
2065	23.96721
2070	24.27454
2075	24.0644
2080	23.92594
2085	24.05133
2090	24.28911
2095	24.46525
2100	24.47752