5-years	Percent
1970-01-01	0.18
1975-01-01	0.25
1980-01-01	0.30
1985-01-01	0.31
1990-01-01	0.34
1995-01-01	0.40
2000-01-01	0.49
2005-01-01	0.86
2010-01-01	1.42