Year	Percent
1950	9.83833
1955	10.91263
1960	10.35446
1965	11.38791
1970	11.64994
1975	12.08637
1980	12.40859
1985	12.51881
1990	12.74875
1995	12.71429
2000	12.79944
2005	12.81258
2010	12.74428
2015	12.55323
2020	12.45942
2025	12.25075
2030	11.90172
2035	11.59288
2040	11.28641
2045	10.97485
2050	10.6665
2055	10.34028
2060	10.01854
2065	9.72566
2070	9.4451
2075	9.19627
2080	8.93417
2085	8.68992
2090	8.45062
2095	8.23483
2100	8.01563