1992

5.3

2005

6.4

1994

6.5

1995

5.0

1987

7.9

1958

7.8

2002

7.4

1979

6.1

1952

7.6

2010

5.8

1998

5.1

1948

7.0

2019

6.8

2009

7.1

2009

5.4

1988

6.0

1997

5.1

2007

6.7

1995

5.6

2019

8.1