2019

5.9

2016

3.5

2006

5.6

2005

6.4

1992

6.5

1971

7.0

1996

7.0

1976

8.1

2001

5.3

1997

7.6

1995

7.0

1999

7.5

2021

6.3

2002

6.4

1989

6.3

1999

6.5

2005

4.8

2009

4.7

2007

5.6

1997

7.6