Year	Percent
1950	13.15849
1955	12.50168
1960	13.65697
1965	13.52398
1970	17.96307
1975	16.63533
1980	13.88036
1985	12.47561
1990	10.36725
1995	12.65529
2000	13.61927
2005	11.24311
2010	9.80381
2015	8.51187
2020	8.71835
2025	8.82852
2030	8.45947
2035	7.58576
2040	6.68193
2045	6.19217
2050	6.11819
2055	6.10649
2060	5.91513
2065	5.55335
2070	5.18807
2075	5.00022
2080	4.9951
2085	5.0268
2090	4.97094
2095	4.82627
2100	4.64401