Year	Percent
1950	5.55523
1955	4.82213
1960	4.65094
1965	4.80423
1970	4.95712
1975	5.32535
1980	5.2213
1985	4.92873
1990	5.22062
1995	5.46802
2000	6.05109
2005	6.59125
2010	6.93608
2015	7.05575
2020	7.89768
2025	9.51746
2030	11.47335
2035	13.41073
2040	15.73649
2045	18.32393
2050	20.93412
2055	23.57584
2060	26.33193
2065	29.01828
2070	31.24078
2075	33.14076
2080	34.79512
2085	36.13472
2090	37.13862
2095	37.81223
2100	38.23635