2002

5.5

2007

7.9

1980

8.6

2004

6.6

2015

7.0

2010

7.8

2011

7.0

2018

6.8

1973

5.0

1995

7.8

1999

7.0

1987

8.4

1988

8.1

1966

8.0

2001

7.6

1978

7.2

1980

6.9

2019

7.8

1993

7.9

1999

8.4