Year	Percent
1950	15.54381
1955	16.8955
1960	17.17071
1965	18.41835
1970	20.01379
1975	19.67383
1980	17.98528
1985	15.40849
1990	14.08299
1995	11.90343
2000	10.51621
2005	9.87222
2010	10.04044
2015	10.25799
2020	9.03024
2025	7.9912
2030	7.17188
2035	6.69321
2040	6.50691
2045	6.41901
2050	6.24321
2055	5.96388
2060	5.67964
2065	5.50303
2070	5.4421
2075	5.44131
2080	5.41703
2085	5.33234
2090	5.20483
2095	5.10182
2100	5.04655