Year	Percent
1950	9.56916
1955	7.99723
1960	7.31405
1965	8.56016
1970	10.18926
1975	10.8501
1980	10.91263
1985	10.11688
1990	10.42286
1995	9.31481
2000	8.18041
2005	7.57192
2010	6.85812
2015	5.88623
2020	6.52529
2025	6.8101
2030	6.70859
2035	5.98567
2040	5.60024
2045	5.52187
2050	5.56223
2055	5.63908
2060	5.62588
2065	5.49485
2070	5.34167
2075	5.26603
2080	5.26439
2085	5.28345
2090	5.26949
2095	5.21196
2100	5.13812