Year	Percent
1950	11.99058
1955	11.30121
1960	12.19212
1965	13.45815
1970	12.95419
1975	12.3504
1980	12.54459
1985	11.35966
1990	8.73366
1995	10.55977
2000	10.01866
2005	9.29044
2010	9.12942
2015	8.41548
2020	7.69575
2025	7.2756
2030	7.05099
2035	6.84159
2040	6.55622
2045	6.23863
2050	5.97814
2055	5.80751
2060	5.7086
2065	5.61937
2070	5.50238
2075	5.36437
2080	5.24674
2085	5.16213
2090	5.12049
2095	5.09173
2100	5.04957