Year	Percent
1950	16.02471
1955	14.94029
1960	13.80241
1965	12.80005
1970	12.07683
1975	11.52167
1980	10.7032
1985	9.78984
1990	9.59925
1995	10.00651
2000	10.33723
2005	10.71229
2010	11.25241
2015	12.37096
2020	13.96769
2025	15.76621
2030	17.32552
2035	18.18005
2040	19.06967
2045	19.94432
2050	20.96348
2055	21.93459
2060	22.58223
2065	23.04067
2070	23.3672
2075	23.83027
2080	24.23816
2085	24.53654
2090	24.72128
2095	24.81679
2100	24.86647