Year	Percent
1950	6.02812
1955	4.94083
1960	4.68726
1965	4.75811
1970	4.35778
1975	4.38192
1980	3.13558
1985	3.03169
1990	3.38004
1995	3.75612
2000	4.2929
2005	4.64122
2010	5.44733
2015	5.68161
2020	5.88991
2025	6.14459
2030	6.61942
2035	7.22588
2040	6.73279
2045	7.01611
2050	7.27835
2055	7.98443
2060	9.73824
2065	11.17572
2070	12.9557
2075	14.86551
2080	16.66911
2085	18.52499
2090	20.41567
2095	22.2673
2100	24.02738