Year	Percent
1950	17.5138
1955	16.75972
1960	15.08952
1965	14.52674
1970	14.71782
1975	14.89047
1980	15.39842
1985	16.46117
1990	17.14447
1995	17.02115
2000	18.66335
2005	18.57362
2010	19.34854
2015	18.64737
2020	20.41358
2025	24.04341
2030	28.13924
2035	31.64263
2040	32.9375
2045	31.44118
2050	27.59089
2055	23.81785
2060	21.21344
2065	20.71985
2070	21.9594
2075	22.74202
2080	22.88286
2085	21.91304
2090	20.91809
2095	20.70635
2100	21.22037