Year	Percent
1950	4.82951
1955	4.75437
1960	4.59367
1965	4.35029
1970	4.04113
1975	3.70281
1980	3.34074
1985	3.3953
1990	3.87569
1995	3.75398
2000	4.31729
2005	4.09987
2010	4.14726
2015	4.63846
2020	5.27287
2025	6.20215
2030	6.53966
2035	7.09952
2040	8.06761
2045	9.7601
2050	11.58067
2055	12.69463
2060	14.13357
2065	15.81604
2070	17.79857
2075	19.76844
2080	21.60501
2085	23.28721
2090	24.92525
2095	26.60018
2100	28.26195