1988

5.6

2005

5.5

1992

7.4

2018

7.9

1995

5.9

2000

7.4

2006

6.7

2010

7.3

1999

7.3

2020

5.2

1975

5.6

1994

5.4

1989

5.9

2009

7.2

2004

7.8

2022

7.0

1984

7.1

1931

8.1

2007

6.9

1980

7.1