Year	Percent
1950	9.20533
1955	9.15745
1960	9.45198
1965	9.59406
1970	9.36253
1975	9.0015
1980	8.67965
1985	9.17513
1990	10.17624
1995	9.35197
2000	9.1579
2005	8.90122
2010	8.34311
2015	8.25012
2020	7.99617
2025	7.81834
2030	7.49749
2035	7.17737
2040	6.89789
2045	6.64631
2050	6.4207
2055	6.21477
2060	6.02549
2065	5.84174
2070	5.67941
2075	5.55043
2080	5.43796
2085	5.34649
2090	5.2598
2095	5.17598
2100	5.10536