1929

6.1

1940

8.1

2000

7.6

1987

7.3

2002

7.1

2005

7.8

1995

7.7

1993

7.4

1986

7.1

1935

6.4

1999

5.9

2018

7.0

1962

7.3

2000

8.1

1958

7.6

1993

7.2

1973

7.1

1968

7.3

2016

6.4

1998

7.4