2018

4.9

1931

5.0

1994

6.7

2005

6.2

1994

7.1

2008

6.5

1997

6.2

2006

5.1

1992

6.1

1987

6.8

2001

6.9

2008

5.3

1990

5.8

1977

7.0

2003

7.1

1985

6.6

1961

4.0

1980

6.3

1988

7.1

1998

7.0