1995

7.0

1996

5.2

1998

5.1

2018

6.5

2019

7.4

1985

8.3

2007

7.0

1990

6.0

2010

7.1

1995

8.0

1993

6.1

1994

6.6

1958

7.8

2009

5.8

2008

7.0

2018

6.8

1990

5.8

2011

6.9

2016

7.9

1939

7.9