Year	Percent
1950	6.13583
1955	6.0528
1960	6.49075
1965	6.42825
1970	6.66914
1975	6.92878
1980	6.47714
1985	6.52829
1990	7.97983
1995	8.89017
2000	9.503
2005	10.26358
2010	11.32673
2015	12.76897
2020	14.49749
2025	16.67197
2030	18.91635
2035	21.39982
2040	24.01361
2045	26.53619
2050	28.67327
2055	30.49909
2060	32.35542
2065	33.95098
2070	35.32553
2075	36.61551
2080	37.70841
2085	38.59239
2090	39.28022
2095	39.86808
2100	40.35456