Year	Percent
1950	11.52328
1955	12.0129
1960	11.18114
1965	10.36452
1970	11.3484
1975	11.97252
1980	12.02897
1985	11.74805
1990	11.80541
1995	12.22299
2000	12.80736
2005	12.28116
2010	11.46141
2015	10.32419
2020	10.51836
2025	10.66005
2030	10.16106
2035	9.46709
2040	8.8205
2045	8.42626
2050	8.22318
2055	7.99537
2060	7.65022
2065	7.24749
2070	6.90669
2075	6.6684
2080	6.49074
2085	6.32777
2090	6.13999
2095	5.94966
2100	5.78299