Year	Percent
1950	11.13214
1955	11.49912
1960	12.34442
1965	12.18665
1970	12.79972
1975	12.07669
1980	11.60407
1985	10.63025
1990	10.66482
1995	10.28558
2000	9.00587
2005	8.14806
2010	7.73661
2015	7.90069
2020	7.8145
2025	7.02212
2030	6.4404
2035	5.96801
2040	5.72122
2045	5.67103
2050	5.60842
2055	5.38489
2060	5.08872
2065	4.85153
2070	4.74308
2075	4.73593
2080	4.75738
2085	4.70014
2090	4.57583
2095	4.45405
2100	4.40374