Year	Percent
1950	10.45956
1955	9.2719
1960	9.64539
1965	10.0689
1970	13.51963
1975	13.51014
1980	12.47948
1985	10.43591
1990	11.21754
1995	8.80928
2000	8.38626
2005	7.74208
2010	6.38412
2015	6.40766
2020	6.47017
2025	6.33231
2030	5.63551
2035	5.27471
2040	5.19927
2045	5.23064
2050	5.30456
2055	5.29582
2060	5.18236
2065	5.05038
2070	4.98768
2075	4.98866
2080	5.00488
2085	4.99049
2090	4.93644
2095	4.86828
2100	4.82243