Year	Percent
1950	4.94896
1955	4.71272
1960	4.51382
1965	4.4307
1970	4.17265
1975	4.24121
1980	4.46416
1985	4.44618
1990	4.6003
1995	4.86304
2000	4.74518
2005	4.8128
2010	4.95513
2015	4.91604
2020	4.9293
2025	4.98996
2030	5.16822
2035	5.54934
2040	6.2151
2045	7.11569
2050	8.39391
2055	9.77632
2060	11.21363
2065	12.70088
2070	14.33931
2075	15.75979
2080	17.2252
2085	18.7185
2090	20.2161
2095	21.68019
2100	23.11164