1995

6.5

1995

8.0

1972

8.7

1974

8.6

1990

7.4

1961

7.6

1955

7.2

1990

8.5

1954

7.9

2004

6.9

1965

7.0

2013

5.6

1993

7.5

2002

7.4

1990

6.0

1988

6.3

1973

5.4

2003

6.3

1995

7.7

1977

7.1