Year	Percent
1950	26.34217
1955	27.51203
1960	29.69694
1965	27.57621
1970	24.8395
1975	25.35366
1980	26.66256
1985	29.64616
1990	30.94937
1995	31.23637
2000	32.14626
2005	32.66366
2010	34.28402
2015	34.86949
2020	33.16488
2025	31.65014
2030	29.87463
2035	30.23634
2040	31.59032
2045	32.07242
2050	31.76135
2055	29.93693
2060	28.92689
2065	28.81024
2070	29.03193
2075	28.89915
2080	28.18553
2085	27.22995
2090	26.49875
2095	26.19539
2100	26.11477