1998

6.8

2006

4.9

1964

6.5

2014

5.1

2007

5.6

2001

5.9

1999

5.1

1996

6.2

2017

6.9

1961

7.5

2004

6.2

1955

7.3

2001

6.8

2005

6.0

1997

7.2

1982

6.4

1994

6.2

2001

6.3

1956

6.2

2002

5.6