Year	Percent
1950	9.63282
1955	9.96322
1960	9.76441
1965	9.0492
1970	9.46256
1975	8.74099
1980	11.91215
1985	11.52588
1990	10.32737
1995	6.98353
2000	6.69016
2005	7.54461
2010	6.60946
2015	6.10904
2020	5.3785
2025	4.97689
2030	5.27307
2035	5.14653
2040	5.02848
2045	4.83576
2050	4.67678
2055	4.63607
2060	4.71725
2065	4.81879
2070	4.84658
2075	4.80213
2080	4.74036
2085	4.71643
2090	4.74094
2095	4.77454
2100	4.77683