Year	Percent
1950	13.00894
1955	17.39615
1960	19.22384
1965	19.36215
1970	15.80764
1975	13.00383
1980	11.83006
1985	12.53223
1990	13.57095
1995	12.12359
2000	9.46928
2005	8.21026
2010	8.42296
2015	9.6889
2020	8.39385
2025	7.08343
2030	6.33934
2035	6.21585
2040	6.22657
2045	6.08023
2050	5.80266
2055	5.53892
2060	5.36807
2065	5.33362
2070	5.35558
2075	5.34664
2080	5.2851
2085	5.19454
2090	5.11669
2095	5.08106
2100	5.08355