1997

7.6

1970

2.8

1999

6.8

1962

7.3

1993

5.5

1996

6.4

1999

7.5

2003

5.8

2008

5.7

1991

7.3

2021

6.8

2007

6.1

2005

3.7

2001

5.0

2008

5.1

2014

6.6

1991

4.9

1994

6.6

2006

5.2

1975

5.8