1932

6.0

2008

6.8

2008

5.8

1990

6.1

1998

6.1

1998

7.1

1999

6.0

1978

6.3

1991

6.2

1984

6.1

1994

5.2

1996

5.4

2006

6.5

1992

6.8

1982

6.8

1996

6.2

1996

4.8

1989

6.2

2015

6.8

2017

0.0