2010

6.8

1990

5.8

1992

6.5

2016

6.7

2011

7.1

2005

6.9

2010

6.2

2008

6.7

2020

6.4

2020

6.4

2022

6.9

1977

7.3

2002

6.1

2007

6.3

1989

6.4

1953

4.8

1972

6.6

1994

8.9

7.0

1985

7.1