Year	Percent
1950	13.0432
1955	12.07635
1960	12.09558
1965	11.4494
1970	13.38406
1975	15.26124
1980	14.69997
1985	12.71593
1990	11.5845
1995	12.98763
2000	11.52913
2005	11.93674
2010	11.61931
2015	12.05013
2020	11.86181
2025	10.83053
2030	9.85502
2035	9.62037
2040	9.70994
2045	9.737
2050	9.49073
2055	8.91394
2060	8.26632
2065	7.85067
2070	7.72768
2075	7.66554
2080	7.46703
2085	7.0946
2090	6.67591
2095	6.35034
2100	6.18664