Year	Percent
1950	11.18489
1955	8.53259
1960	8.68192
1965	11.61425
1970	13.84136
1975	14.11994
1980	12.43223
1985	11.90944
1990	11.80553
1995	12.15482
2000	12.95313
2005	12.60701
2010	10.13833
2015	8.46068
2020	9.08228
2025	9.37057
2030	8.85822
2035	7.91612
2040	7.14663
2045	6.83512
2050	6.77882
2055	6.6925
2060	6.42516
2065	6.09784
2070	5.84874
2075	5.74427
2080	5.71636
2085	5.67758
2090	5.58317
2095	5.44886
2100	5.33177