Year	Percent
1950	10.35278
1955	11.60104
1960	14.52962
1965	12.33162
1970	13.35298
1975	14.25516
1980	12.4506
1985	9.28909
1990	8.94898
1995	10.65339
2000	7.99201
2005	6.15388
2010	5.80812
2015	5.89587
2020	6.01505
2025	5.6064
2030	5.07423
2035	4.73521
2040	4.59908
2045	4.61791
2050	4.68833
2055	4.69152
2060	4.61135
2065	4.52242
2070	4.50215
2075	4.5581
2080	4.64679
2085	4.69768
2090	4.68743
2095	4.64217
2100	4.61007