1994

7.0

2005

6.7

2006

7.1

1999

7.8

2003

7.2

2001

6.7

2006

6.3

1972

7.0

2005

5.6

1995

6.7

1977

3.3

2013

6.1

1966

2.0

2001

7.4

1991

5.7

1989

7.0

1995

6.5

1958

7.8

2005

6.7

2001

7.3