Year	Percent
1950	10.67185
1955	10.33216
1960	14.46909
1965	13.93418
1970	14.86564
1975	13.77847
1980	12.91692
1985	11.78039
1990	12.52768
1995	10.67754
2000	9.95522
2005	8.03094
2010	7.12573
2015	7.35797
2020	8.33667
2025	7.70696
2030	6.79782
2035	6.36637
2040	6.34974
2045	6.49858
2050	6.52738
2055	6.31286
2060	5.97326
2065	5.71499
2070	5.6283
2075	5.63703
2080	5.61101
2085	5.48412
2090	5.2984
2095	5.14503
2100	5.07791