Year	Percent
1950	15.17979
1955	15.39551
1960	14.20345
1965	13.55227
1970	11.84922
1975	10.83659
1980	9.48144
1985	8.74808
1990	8.122
1995	7.11322
2000	6.56619
2005	4.93974
2010	4.90742
2015	4.82225
2020	4.81913
2025	4.89106
2030	4.77673
2035	4.48899
2040	4.27256
2045	4.23738
2050	4.33222
2055	4.45639
2060	4.50014
2065	4.43462
2070	4.35048
2075	4.3425
2080	4.42703
2085	4.54685
2090	4.62344
2095	4.62081
2100	4.56693