Year	Percent
1950	13.16214
1955	13.50484
1960	13.88763
1965	14.41387
1970	14.64327
1975	14.65974
1980	13.41395
1985	11.68735
1990	10.05702
1995	8.94784
2000	8.10451
2005	7.10564
2010	6.2932
2015	6.00232
2020	5.53132
2025	4.89249
2030	4.59033
2035	4.54348
2040	4.50357
2045	4.4135
2050	4.33174
2055	4.26223
2060	4.2284
2065	4.25934
2070	4.33399
2075	4.38786
2080	4.41078
2085	4.41227
2090	4.42701
2095	4.46272
2100	4.51543