2011

6.1

1983

5.5

1957

7.2

2002

6.4

2008

5.5

1956

7.1

2009

5.6

1993

6.6

2005

6.4

1990

6.1

2008

7.1

2015

7.8

2005

7.8

2000

6.4

2006

6.2

1986

6.8

1999

6.3

1989

6.0

1998

7.1

2011

5.3