2007

5.4

2018

5.8

1985

6.0

2004

6.3

1990

7.5

1993

7.8

1996

7.6

1996

7.3

2005

6.4

1962

5.1

1931

4.2

2000

7.1

2002

6.7

1962

7.2

2013

5.5

2018

6.5

2000

6.2

1993

5.8

1994

7.0

2004

6.4