Year	Percent
1950	11.83484
1955	12.25181
1960	12.28111
1965	11.18618
1970	8.59676
1975	7.45585
1980	7.09282
1985	6.90856
1990	6.74834
1995	6.53953
2000	5.64508
2005	5.12569
2010	5.32726
2015	5.23185
2020	5.12067
2025	4.97224
2030	4.8143
2035	4.67279
2040	4.6629
2045	4.74007
2050	4.80821
2055	4.82788
2060	4.80372
2065	4.76783
2070	4.7471
2075	4.75567
2080	4.76869
2085	4.77079
2090	4.74708
2095	4.70789
2100	4.6703