Year	Percent
1950	10.29146
1955	10.47924
1960	10.49989
1965	10.54255
1970	9.23832
1975	9.41906
1980	9.66146
1985	10.13597
1990	10.47368
1995	10.61613
2000	11.40603
2005	12.00934
2010	10.9308
2015	9.67099
2020	8.60071
2025	8.21014
2030	7.5976
2035	7.34748
2040	6.86338
2045	6.32031
2050	5.85464
2055	5.55088
2060	5.39234
2065	5.30734
2070	5.21889
2075	5.10707
2080	5.00223
2085	4.94435
2090	4.94139
2095	4.96419
2100	4.97589