Year	Percent
1950	27.58809
1955	27.74549
1960	27.81962
1965	27.89518
1970	27.11103
1975	24.71107
1980	24.13793
1985	23.92822
1990	23.81793
1995	22.9462
2000	24.24094
2005	26.55466
2010	29.66276
2015	32.38971
2020	33.20011
2025	33.38068
2030	33.23107
2035	33.03502
2040	33.25307
2045	33.30592
2050	32.9569
2055	32.24166
2060	31.49039
2065	30.79904
2070	30.12399
2075	29.35479
2080	28.48078
2085	27.55984
2090	26.65988
2095	25.88532
2100	25.2709