Year	Percent
1950	3.98757
1955	4.25901
1960	4.45747
1965	4.58472
1970	4.6441
1975	4.69547
1980	4.66989
1985	4.42338
1990	4.3934
1995	4.08973
2000	4.03461
2005	4.07681
2010	4.18298
2015	4.27208
2020	4.32786
2025	4.2909
2030	4.27112
2035	4.2931
2040	4.34104
2045	4.48444
2050	4.79566
2055	5.25601
2060	5.90134
2065	6.54482
2070	7.25656
2075	8.00053
2080	8.83653
2085	9.71757
2090	10.62899
2095	11.56028
2100	12.50773