Year	Percent
1950	5.92379
1955	5.52339
1960	5.23395
1965	5.14815
1970	5.28711
1975	5.43417
1980	5.45109
1985	5.29613
1990	5.468
1995	5.31884
2000	5.191
2005	5.05281
2010	4.88001
2015	5.09334
2020	5.51675
2025	6.00951
2030	6.52447
2035	7.0841
2040	7.77348
2045	8.69941
2050	9.72172
2055	10.67483
2060	11.59276
2065	12.56716
2070	13.67991
2075	14.93794
2080	16.17766
2085	17.37865
2090	18.5405
2095	19.69787
2100	20.87356