5-years	Percent
1970-01-01	0.17
1975-01-01	0.20
1980-01-01	0.27
1985-01-01	0.37
1990-01-01	0.52
1995-01-01	0.67
2000-01-01	0.85
2005-01-01	0.99
2010-01-01	1.11