Year	Percent
1950	15.61343
1955	13.94897
1960	13.90794
1965	14.79824
1970	16.68974
1975	15.59731
1980	12.53451
1985	12.50242
1990	13.36872
1995	11.96191
2000	13.1105
2005	12.14413
2010	11.95822
2015	12.1375
2020	11.17118
2025	10.20341
2030	9.96776
2035	10.02625
2040	9.98227
2045	9.66224
2050	9.05833
2055	8.40517
2060	7.99018
2065	7.85862
2070	7.764
2075	7.52225
2080	7.11002
2085	6.66624
2090	6.32561
2095	6.15313
2100	6.05629