Year	Percent
1950	14.42675
1955	13.85152
1960	12.77501
1965	12.43699
1970	12.02466
1975	11.69643
1980	11.40088
1985	10.88291
1990	10.79178
1995	11.25052
2000	12.01298
2005	13.06403
2010	14.46701
2015	15.98068
2020	17.83584
2025	19.8817
2030	21.85414
2035	23.87507
2040	25.52691
2045	26.69191
2050	27.12573
2055	26.74585
2060	26.24315
2065	25.73899
2070	25.46437
2075	25.38675
2080	25.09232
2085	24.65652
2090	24.19711
2095	23.82753
2100	23.55323