1999

6.9

1996

7.3

2006

6.6

2021

4.4

1994

6.8

1990

6.8

1994

7.4

2007

6.9

1993

6.4

1975

6.0

2007

6.7

2003

6.3

2005

6.2

2008

7.2

1998

6.4

1972

4.2

2014

6.6

1973

3.7

1985

6.2

2012

6.0