Year	Percent
1950	14.56775
1955	14.98832
1960	15.59576
1965	16.89686
1970	18.00858
1975	18.51151
1980	16.9414
1985	17.34705
1990	21.89327
1995	23.54042
2000	25.67182
2005	27.13799
2010	28.51996
2015	30.54775
2020	32.74183
2025	34.65118
2030	35.62062
2035	36.88961
2040	37.64387
2045	38.50696
2050	39.77561
2055	39.89113
2060	37.85108
2065	36.68669
2070	37.00186
2075	37.1979
2080	37.27567
2085	37.28728
2090	37.13342
2095	37.00604
2100	37.18918