Year	Percent
1950	14.52447
1955	17.96016
1960	18.2826
1965	18.08526
1970	18.02281
1975	18.10118
1980	18.24588
1985	17.70104
1990	15.30885
1995	13.68088
2000	12.50305
2005	11.58863
2010	11.29398
2015	11.31568
2020	10.38623
2025	9.43185
2030	8.60976
2035	8.00413
2040	7.56906
2045	7.20789
2050	6.84089
2055	6.46553
2060	6.13012
2065	5.86809
2070	5.68681
2075	5.55684
2080	5.44445
2085	5.32238
2090	5.20335
2095	5.10879
2100	5.04739