1954

6.1

2005

6.8

2006

5.1

2003

6.2

2020

6.7

2002

6.6

1989

7.8

2001

7.2

2002

7.2

2004

7.4

2019

8.1

2003

7.3

1962

7.7

1975

8.4

2003

6.7

2006

7.2

2006

5.7

2016

6.5

1979

6.4

1952

7.9