Year	Percent
1950	5.50714
1955	5.60593
1960	5.83991
1965	5.78847
1970	5.84174
1975	5.90837
1980	5.29406
1985	4.93536
1990	5.86432
1995	6.03601
2000	5.40332
2005	4.48807
2010	5.87252
2015	6.00147
2020	6.51688
2025	7.44094
2030	8.39662
2035	9.46395
2040	10.44799
2045	11.75046
2050	13.37999
2055	15.32868
2060	17.35269
2065	19.19197
2070	20.55717
2075	21.83238
2080	23.22349
2085	24.63795
2090	25.96141
2095	27.12935
2100	28.1799