Year	Percent
1950	13.92375
1955	14.38033
1960	12.37229
1965	11.64054
1970	11.52319
1975	12.35029
1980	11.92008
1985	10.91315
1990	10.4543
1995	9.53168
2000	9.79029
2005	9.70098
2010	9.59065
2015	9.93209
2020	9.15414
2025	8.58113
2030	8.23684
2035	8.09269
2040	8.001
2045	7.84361
2050	7.537
2055	7.15829
2060	6.8016
2065	6.5406
2070	6.36443
2075	6.20091
2080	6.01572
2085	5.79178
2090	5.56401
2095	5.3708
2100	5.2252