1984

6.6

1942

4.3

1989

2.1

1969

5.4

2009

5.7

1964

7.3

1947

6.0

1973

4.6

2013

8.1

2017

4.7

1993

4.7

1958

5.9

1984

4.0

1997

6.6

2008

5.8

1998

6.3

2000

6.3

1998

7.1

1979

7.0

1975

7.3