Year	Percent
1950	23.01908
1955	25.9474
1960	24.38359
1965	25.01286
1970	26.39177
1975	24.89442
1980	27.89481
1985	25.98186
1990	24.06858
1995	26.22899
2000	26.06833
2005	28.27135
2010	28.53165
2015	27.84894
2020	27.78459
2025	28.34983
2030	29.95115
2035	29.45265
2040	27.10115
2045	23.88174
2050	21.76787
2055	21.75608
2060	23.01205
2065	24.32104
2070	24.00275
2075	23.17116
2080	22.58961
2085	22.6059
2090	23.07377
2095	23.51301
2100	23.49671