1987

7.1

2014

6.5

1973

6.8

2018

6.1

1998

5.0

2002

6.9

1987

6.9

2016

7.1

2017

6.0

1953

0.0

1994

8.5

1969

6.7

1967

7.3

2015

7.0

1944

7.0

1989

6.7

1923

7.5

1990

7.4

1992

6.8

2006

7.7