1998

6.9

2000

8.0

2017

6.4

1991

8.3

1996

7.9

1998

7.7

1965

6.3

2006

7.4

1997

6.8

1998

6.5

1964

7.1

1993

6.2

1932

5.2

2005

6.5

2002

7.2

1971

7.4

2004

4.8

2006

7.1

2006

7.4

1998

6.8