Year	Percent
1950	14.59258
1955	7.12375
1960	8.56588
1965	11.8724
1970	14.24357
1975	13.5256
1980	10.38844
1985	9.55647
1990	9.27817
1995	10.08035
2000	11.42743
2005	9.51324
2010	7.25131
2015	6.80535
2020	7.66006
2025	7.86935
2030	7.1069
2035	6.25778
2040	5.60662
2045	5.35236
2050	5.46938
2055	5.59453
2060	5.45562
2065	5.15627
2070	4.89526
2075	4.82805
2080	4.94577
2085	5.10068
2090	5.15017
2095	5.07102
2100	4.96013