Year	Percent
1950	11.12393
1955	10.99966
1960	10.48283
1965	11.51279
1970	11.51116
1975	12.17189
1980	13.54976
1985	14.18946
1990	13.7923
1995	12.83795
2000	12.18641
2005	10.43635
2010	9.13032
2015	8.78437
2020	8.78417
2025	8.72989
2030	7.8247
2035	7.02048
2040	6.35318
2045	5.96194
2050	5.83392
2055	5.80775
2060	5.70713
2065	5.49929
2070	5.26829
2075	5.12271
2080	5.08145
2085	5.10272
2090	5.11466
2095	5.07597
2100	4.99554