Year	Percent
1950	10.98681
1955	9.97872
1960	11.0988
1965	12.68105
1970	13.79827
1975	14.01996
1980	13.94055
1985	13.20208
1990	12.55705
1995	13.40578
2000	11.94388
2005	12.01015
2010	11.7267
2015	10.93023
2020	9.52295
2025	9.06145
2030	8.89123
2035	8.55796
2040	8.04358
2045	7.50091
2050	7.06053
2055	6.75326
2060	6.53206
2065	6.32008
2070	6.10734
2075	5.89877
2080	5.73358
2085	5.61651
2090	5.52954
2095	5.45832
2100	5.38045