Year	Percent
1950	15.00075
1955	14.63184
1960	14.25145
1965	14.00851
1970	13.94256
1975	13.61735
1980	13.3479
1985	13.46627
1990	13.41513
1995	14.01347
2000	14.61577
2005	15.12529
2010	15.9354
2015	16.79734
2020	18.08962
2025	19.53041
2030	20.86243
2035	22.06971
2040	23.09474
2045	23.84904
2050	24.3479
2055	24.53124
2060	24.59871
2065	24.67414
2070	24.79609
2075	24.94674
2080	24.94153
2085	24.82297
2090	24.64464
2095	24.44677
2100	24.24313