Year	Percent
1950	19.38317
1955	17.0929
1960	13.87773
1965	12.4553
1970	14.1858
1975	15.006
1980	17.06034
1985	15.37343
1990	13.71762
1995	13.84762
2000	15.13382
2005	17.88608
2010	19.15188
2015	19.2701
2020	19.05221
2025	19.29728
2030	21.53402
2035	23.09704
2040	23.34017
2045	22.2186
2050	21.44866
2055	22.96362
2060	24.78432
2065	26.4535
2070	26.54873
2075	25.31431
2080	24.844
2085	25.10053
2090	25.62769
2095	25.83
2100	25.53842