2014

6.8

2021

9.3

1999

5.1

1983

6.5

2003

5.0

1991

5.7

2011

7.0

2018

6.3

1997

6.5

1985

6.1

2010

7.3

1977

6.7

2016

6.7

1986

5.7

2001

6.1

1999

8.0

1990

6.0