Year	Percent
1950	8.36044
1955	11.83112
1960	12.69979
1965	12.94946
1970	12.52361
1975	12.95501
1980	11.56595
1985	11.04142
1990	10.31065
1995	11.22844
2000	12.25096
2005	12.06767
2010	12.13193
2015	11.79168
2020	10.92805
2025	10.11239
2030	9.66268
2035	9.44119
2040	9.22713
2045	8.9351
2050	8.55382
2055	8.15274
2060	7.80688
2065	7.54372
2070	7.32633
2075	7.09343
2080	6.8325
2085	6.56714
2090	6.33954
2095	6.1414
2100	5.98329