Year	Percent
1950	4.38341
1955	3.99019
1960	3.73262
1965	3.58036
1970	3.55579
1975	3.61702
1980	3.72719
1985	3.86193
1990	4.24941
1995	4.79576
2000	5.10757
2005	5.122
2010	5.18061
2015	4.9238
2020	4.76357
2025	4.65893
2030	4.64525
2035	4.87319
2040	5.69589
2045	7.10545
2050	8.54682
2055	9.54039
2060	10.50028
2065	11.95865
2070	13.74466
2075	15.40192
2080	16.93648
2085	18.40906
2090	19.9171
2095	21.51731
2100	23.16428