1987

7.2

2007

8.0

2011

6.6

2014

5.8

1969

6.0

2023

5.8

2004

4.6

1998

5.8

2000

7.5

2003

7.6

1994

7.5

2004

5.3

2006

6.9

1999

4.6

1994

6.2

2019

7.0

2000

6.9

1995

5.4

2002

5.3

2000

5.2

1985

7.7

1991

5.9

1989

7.0

1999

6.7

1991

6.0

1996

7.0

1995

0.0

1997

8.3

2009

7.4

2008

7.1

2001

7.0

2015

8.1

2009

6.8

1995

7.7

2011

4.2

1993

8.4

1972

0.0

1994

6.0

1987

6.5