Year	Percent
1950	10.28013
1955	8.3677
1960	7.24335
1965	7.49501
1970	10.10593
1975	11.45122
1980	11.5285
1985	11.18502
1990	10.93327
1995	10.51035
2000	10.77733
2005	10.95983
2010	10.41256
2015	7.74934
2020	6.96797
2025	7.364
2030	7.66635
2035	7.32675
2040	6.98281
2045	6.25066
2050	5.75227
2055	5.66555
2060	5.79506
2065	5.8773
2070	5.81431
2075	5.62985
2080	5.44327
2085	5.37882
2090	5.43487
2095	5.50156
2100	5.49762