Year	Percent
1950	9.88618
1955	10.38867
1960	13.49741
1965	14.91153
1970	14.72226
1975	14.08087
1980	13.74449
1985	12.867
1990	12.4801
1995	12.09996
2000	11.35823
2005	8.46871
2010	7.52381
2015	7.73032
2020	7.83954
2025	7.40306
2030	7.01813
2035	6.29103
2040	5.74386
2045	5.60243
2050	5.6643
2055	5.67903
2060	5.56728
2065	5.36076
2070	5.16941
2075	5.10267
2080	5.15521
2085	5.22014
2090	5.21656
2095	5.13385
2100	5.03003