Year	Percent
1950	10.72145
1955	8.86086
1960	9.61992
1965	8.89314
1970	9.11918
1975	8.65166
1980	8.52616
1985	7.78254
1990	7.70703
1995	6.97692
2000	5.67277
2005	5.3055
2010	5.15293
2015	5.08456
2020	5.46822
2025	4.84552
2030	4.2898
2035	3.99126
2040	4.0048
2045	4.15203
2050	4.33422
2055	4.40625
2060	4.33027
2065	4.23016
2070	4.23552
2075	4.36019
2080	4.52616
2085	4.64036
2090	4.65901
2095	4.60843
2100	4.56236