Year	Percent
1950	15.85313
1955	8.26883
1960	9.51566
1965	11.50311
1970	12.95941
1975	12.75802
1980	10.60153
1985	10.54095
1990	10.10841
1995	10.31063
2000	11.34296
2005	9.65604
2010	7.37319
2015	6.78702
2020	9.16393
2025	10.74265
2030	9.45797
2035	8.32981
2040	7.58802
2045	7.43867
2050	7.63852
2055	7.80763
2060	7.66249
2065	7.20638
2070	6.70713
2075	6.42076
2080	6.34264
2085	6.33433
2090	6.25862
2095	6.0815
2100	5.85842