1988

8.0

2008

7.6

1998

7.1

2006

8.6

2001

7.8

1995

8.2

2009

7.5

1999

7.9

1989

8.0

2015

6.7

1969

8.2

2010

7.8

2025

6.3

2011

6.1

2009

7.6

1982

7.6

1962

7.3

1972

7.9

2019

6.8

2004

8.1