1993

6.3

1991

6.7

2002

6.2

1997

6.8

2005

6.7

2004

6.3

2007

6.5

1958

6.0

2023

7.1

2007

7.0

2000

6.6

1993

7.0

2005

5.9

1999

6.5

2001

1.3

2014

9.3

2008

6.6

1968

5.7

1985

4.5

1966

7.2