Year	Percent
1950	7.76568
1955	7.26742
1960	6.36647
1965	5.81247
1970	5.02981
1975	4.36991
1980	4.19068
1985	4.35008
1990	4.87257
1995	5.19893
2000	5.59184
2005	5.94179
2010	6.22809
2015	7.02212
2020	7.88949
2025	8.80486
2030	9.84967
2035	11.20691
2040	13.23407
2045	15.87025
2050	18.23221
2055	20.2625
2060	21.91766
2065	23.23451
2070	24.57535
2075	26.23217
2080	27.74178
2085	29.04514
2090	30.13896
2095	31.07553
2100	31.9125