Year	Percent
1950	6.36959
1955	5.89209
1960	5.39426
1965	5.2527
1970	5.1085
1975	5.06982
1980	5.06245
1985	4.7145
1990	5.94916
1995	5.99666
2000	6.28458
2005	6.3581
2010	7.73393
2015	8.76125
2020	10.12859
2025	11.65715
2030	13.1656
2035	14.65098
2040	16.11152
2045	16.98919
2050	16.97005
2055	19.21653
2060	21.6041
2065	23.43306
2070	24.63443
2075	26.05868
2080	27.57081
2085	28.94735
2090	30.16502
2095	31.24429
2100	32.18905