1985

4.4

2003

5.7

1999

7.4

2022

7.2

1997

6.9

2002

7.8

1997

7.3

2007

6.3

1964

7.3

2001

6.8

2006

7.1

2008

6.1

2001

6.5

2023

5.9

2003

8.3

1980

8.2

2000

7.0

1999

8.0

1960

8.4

1997

7.9