1987

6.3

2013

5.5

1992

5.7

1963

7.5

2018

5.9

1983

6.3

1988

6.3

1961

6.9

2013

7.6

1972

7.1

2015

8.1

2014

6.4

1986

6.4

1994

4.7

2008

5.3

2006

7.4

1989

5.1

1992

6.3

1993

4.8

2015

6.4