Year	Percent
1950	10.62815
1955	11.60304
1960	14.51451
1965	12.34799
1970	13.37442
1975	14.18935
1980	12.48341
1985	9.32564
1990	8.98558
1995	10.74072
2000	8.19873
2005	6.36127
2010	6.04898
2015	6.16306
2020	6.26355
2025	5.81566
2030	5.2458
2035	4.87887
2040	4.72197
2045	4.72229
2050	4.77171
2055	4.74804
2060	4.63739
2065	4.51755
2070	4.48763
2075	4.53565
2080	4.61956
2085	4.66901
2090	4.66128
2095	4.62319
2100	4.60063