Year	Percent
1950	6.51956
1955	6.29952
1960	6.15295
1965	6.09401
1970	6.11084
1975	5.99834
1980	5.82467
1985	5.85406
1990	6.37506
1995	6.5932
2000	6.50436
2005	6.32697
2010	6.6459
2015	6.74243
2020	6.55826
2025	6.19078
2030	5.89856
2035	5.87482
2040	6.43371
2045	7.73674
2050	9.43892
2055	11.26054
2060	13.11742
2065	14.5983
2070	15.99749
2075	17.75876
2080	19.58086
2085	21.25018
2090	22.71107
2095	24.06128
2100	25.3485