Year	Percent
1950	10.39414
1955	10.73094
1960	10.72051
1965	10.9057
1970	10.76203
1975	10.89326
1980	11.13377
1985	12.79507
1990	10.70753
1995	9.43523
2000	8.93969
2005	9.28161
2010	8.1717
2015	7.50564
2020	7.01014
2025	7.04639
2030	6.81341
2035	6.56543
2040	6.34213
2045	6.11688
2050	5.89867
2055	5.73786
2060	5.6383
2065	5.55714
2070	5.46832
2075	5.36129
2080	5.26198
2085	5.18724
2090	5.13412
2095	5.09417
2100	5.05279