Year	Percent
1950	14.14102
1955	15.24746
1960	14.22328
1965	14.63026
1970	14.36887
1975	13.74882
1980	11.32926
1985	10.81688
1990	13.24967
1995	14.25109
2000	13.346
2005	13.26867
2010	13.1488
2015	12.01194
2020	11.02302
2025	10.46274
2030	10.15646
2035	9.85456
2040	9.46669
2045	8.99171
2050	8.51278
2055	8.11034
2060	7.80719
2065	7.55697
2070	7.2895
2075	6.99131
2080	6.68823
2085	6.4223
2090	6.19141
2095	6.00574
2100	5.84326