1942

6.2

2018

7.2

1986

6.1

1990

6.2

1991

6.8

2006

5.6

2003

4.0

1991

7.4

2004

6.2

1939

6.9

2007

7.8

1992

6.2

1980

6.4

2009

4.4

1998

5.9

2006

6.3

2011

6.9

2003

7.1

1994

6.1

1997

6.8