Year	Percent
1950	9.87045
1955	9.06763
1960	8.20336
1965	7.62454
1970	7.40656
1975	7.54267
1980	7.42685
1985	6.53428
1990	6.0761
1995	4.78001
2000	3.81694
2005	4.03729
2010	4.57714
2015	4.423
2020	4.38746
2025	4.27099
2030	4.08522
2035	4.02223
2040	4.21458
2045	4.44354
2050	4.52724
2055	4.50236
2060	4.44969
2065	4.45275
2070	4.55834
2075	4.71776
2080	4.82824
2085	4.83044
2090	4.76081
2095	4.69418
2100	4.68531