Year	Percent
1950	7.77185
1955	9.05825
1960	8.48967
1965	7.02136
1970	6.55906
1975	6.41389
1980	7.72788
1985	8.18408
1990	6.32186
1995	5.92175
2000	5.47195
2005	4.14684
2010	4.35216
2015	5.15497
2020	4.99215
2025	4.86575
2030	4.62977
2035	4.35143
2040	4.26321
2045	4.51196
2050	4.79202
2055	4.86799
2060	4.80324
2065	4.70191
2070	4.65904
2075	4.7432
2080	4.90815
2085	5.0144
2090	4.99566
2095	4.88892
2100	4.77922