Year	Percent
1950	12.21675
1955	14.76103
1960	16.12341
1965	18.65112
1970	17.9019
1975	17.51122
1980	16.24837
1985	15.72121
1990	15.20297
1995	12.27442
2000	9.75792
2005	8.77133
2010	10.3337
2015	12.06224
2020	10.52819
2025	9.09543
2030	8.09706
2035	7.63011
2040	7.60349
2045	7.73378
2050	7.71709
2055	7.32837
2060	6.77397
2065	6.39149
2070	6.25876
2075	6.27449
2080	6.28387
2085	6.16535
2090	5.93644
2095	5.69018
2100	5.54219