1988

4.9

2003

3.9

1938

5.0

1962

7.0

1963

7.1

1965

6.6

1977

6.8

1987

6.5

1997

6.4

1997

6.6

1999

6.3

2002

6.0

2001

7.4

1971

6.4

1998

6.6

1964

3.0

1997

5.1

2010

6.4

1998

4.4

1999

6.4