Year	Percent
1950	11.0204
1955	12.85986
1960	12.3753
1965	11.71991
1970	10.8663
1975	9.45048
1980	8.04071
1985	8.07866
1990	8.84316
1995	8.29844
2000	7.86475
2005	6.86031
2010	5.97306
2015	5.79967
2020	5.75969
2025	5.43791
2030	4.99422
2035	4.76873
2040	4.68342
2045	4.66293
2050	4.61517
2055	4.52014
2060	4.42749
2065	4.37714
2070	4.39779
2075	4.45167
2080	4.49693
2085	4.51965
2090	4.52548
2095	4.52584
2100	4.54621