Year	Percent
1950	16.55868
1955	18.65974
1960	18.86115
1965	17.51508
1970	16.48386
1975	15.69774
1980	13.60388
1985	13.37911
1990	11.88638
1995	12.62668
2000	12.39757
2005	10.8123
2010	9.77738
2015	9.61034
2020	9.36593
2025	8.88169
2030	8.3153
2035	7.76482
2040	7.29714
2045	6.94303
2050	6.63976
2055	6.35064
2060	6.06527
2065	5.81401
2070	5.5963
2075	5.42041
2080	5.2852
2085	5.17057
2090	5.06266
2095	4.96637
2100	4.88957