2001

7.3

1970

7.2

1964

7.1

1996

6.4

2016

3.3

2005

4.0

2005

5.3

2003

5.9

2002

6.8

1988

6.3

2013

8.5

1994

7.5

2007

5.0

2003

5.4

2005

5.5

1996

5.3

1980

6.6

2005

8.0

2009

6.6

2023

0.0