Year	Percent
1950	5.0565
1955	5.06439
1960	5.04879
1965	3.33817
1970	6.1048
1975	5.66296
1980	6.177
1985	6.23637
1990	6.98375
1995	6.82936
2000	6.60938
2005	5.59596
2010	4.70431
2015	4.32006
2020	4.45941
2025	4.95126
2030	5.5276
2035	6.14235
2040	7.46725
2045	8.02127
2050	8.97962
2055	9.5551
2060	10.30462
2065	11.45636
2070	12.69976
2075	13.89588
2080	14.9602
2085	15.98601
2090	17.03558
2095	18.10314
2100	19.17421