Year	Percent
1950	5.76325
1955	5.37168
1960	4.9238
1965	4.7422
1970	4.82414
1975	4.93728
1980	4.92701
1985	5.01759
1990	5.67659
1995	6.13281
2000	6.65407
2005	6.71881
2010	6.70118
2015	7.57041
2020	8.87532
2025	10.3125
2030	11.91508
2035	13.48275
2040	14.82652
2045	16.12568
2050	17.22445
2055	18.25803
2060	19.31586
2065	20.5614
2070	21.67325
2075	22.98832
2080	24.08426
2085	25.01726
2090	25.86839
2095	26.70996
2100	27.55432