1962

7.3

2005

7.0

2014

5.5

2013

6.1

2000

6.7

1971

5.8

1990

7.8

1973

8.3

2007

6.5

2007

5.6

1996

7.3

2006

6.5

1989

6.3

2001

4.9

2000

7.0

2008

6.4

2020

7.4

2023

6.8

1994

5.4

2004

6.6