Year	Percent
1950	15.8296
1955	15.90789
1960	15.88989
1965	15.6323
1970	15.40676
1975	14.96021
1980	14.49501
1985	14.40611
1990	14.41251
1995	15.35491
2000	16.29241
2005	16.89836
2010	17.37449
2015	18.38418
2020	19.63528
2025	21.56859
2030	23.58911
2035	25.00233
2040	25.68236
2045	25.65098
2050	25.58657
2055	26.01761
2060	26.58977
2065	27.09823
2070	27.28863
2075	27.08694
2080	26.85933
2085	26.69979
2090	26.58193
2095	26.4343
2100	26.20258