Year	Percent
1950	12.89029
1955	13.64614
1960	15.11666
1965	15.29164
1970	15.2322
1975	15.46693
1980	15.23941
1985	15.31213
1990	15.02769
1995	14.40107
2000	13.96467
2005	13.12291
2010	12.14354
2015	10.802
2020	9.52799
2025	8.98866
2030	8.44716
2035	7.86172
2040	7.25448
2045	6.71088
2050	6.27041
2055	5.9146
2060	5.63982
2065	5.4066
2070	5.21672
2075	5.03616
2080	4.90151
2085	4.80281
2090	4.74033
2095	4.6957
2100	4.65996