2020

7.5

2011

5.9

1991

5.8

1997

5.4

1999

8.0

1990

6.1

1980

5.3

2009

3.8

2008

5.1

1994

5.7

2016

7.4

2008

7.9

1961

7.2

2007

5.5

2002

6.3

2002

5.2

1990

5.8

1951

7.2

2018

6.9

2004

7.3