Year	Percent
1950	9.34495
1955	8.71883
1960	8.26707
1965	9.18061
1970	11.08802
1975	11.72695
1980	13.25714
1985	11.65896
1990	10.54714
1995	8.68167
2000	9.2238
2005	9.43233
2010	9.48038
2015	9.2169
2020	8.71775
2025	8.38976
2030	8.24339
2035	7.93592
2040	7.61316
2045	7.29724
2050	7.01861
2055	6.76956
2060	6.57134
2065	6.40103
2070	6.25271
2075	6.10559
2080	5.96975
2085	5.85058
2090	5.74386
2095	5.66235
2100	5.58554