1992

6.8

2010

7.0

2005

6.2

1976

7.9

1984

8.5

2022

8.6

1962

7.2

2002

8.2

2005

7.8

2000

6.3

2004

8.3

1999

8.4

2002

8.3

1989

8.0

1999

7.8

2015

7.8

2017

8.2

2006

9.3

1998

9.2

1991

8.0