Year	Percent
1950	5.83696
1955	6.76707
1960	7.05996
1965	6.79923
1970	6.67553
1975	6.24515
1980	6.00873
1985	5.65446
1990	5.80588
1995	5.38612
2000	5.16045
2005	5.07935
2010	5.01607
2015	5.42503
2020	6.33255
2025	7.89379
2030	9.33952
2035	10.86666
2040	12.22318
2045	13.71738
2050	15.72152
2055	16.65935
2060	16.62972
2065	16.39721
2070	17.33935
2075	19.78935
2080	21.76287
2085	23.14503
2090	24.07515
2095	24.82044
2100	25.65403