1935

7.5

1975

7.7

2009

8.5

1955

7.3

1982

5.9

1968

7.1

1989

7.8

2014

5.5

1994

6.9

2021

5.6

1988

5.1

1972

7.4

1994

4.6

2010

5.5

2006

6.9

1984

5.5

1965

6.7

1990

7.4

2006

7.2

2002

7.3