Year	Percent
1950	4.37907
1955	4.36779
1960	4.26779
1965	4.24599
1970	4.22992
1975	4.20948
1980	4.19923
1985	4.17084
1990	4.28328
1995	4.45549
2000	4.66185
2005	4.60378
2010	4.67127
2015	4.77244
2020	4.93714
2025	5.15594
2030	5.41431
2035	5.68895
2040	6.32576
2045	7.73644
2050	9.87225
2055	12.0713
2060	13.8916
2065	15.43367
2070	17.10824
2075	18.91122
2080	20.7571
2085	22.44403
2090	23.94122
2095	25.31531
2100	26.62323