Year	Percent
1950	9.89688
1955	10.5566
1960	10.6321
1965	11.97748
1970	11.3473
1975	11.06061
1980	10.84071
1985	11.41887
1990	12.08977
1995	12.85887
2000	12.87625
2005	12.78559
2010	11.9834
2015	11.59227
2020	11.80416
2025	11.87751
2030	11.50866
2035	10.99558
2040	10.4939
2045	10.13957
2050	9.87355
2055	9.58997
2060	9.25929
2065	8.88567
2070	8.53724
2075	8.24677
2080	7.97613
2085	7.72206
2090	7.44416
2095	7.16831
2100	6.90585