1972

7.7

1999

7.5

2005

8.2

2019

6.9

2011

7.3

2019

7.3

2003

8.0

1984

5.8

2002

6.3

1998

8.0

1999

6.1

2021

6.3

1999

7.9

2000

7.5

1987

5.0

2001

6.8

2006

7.0

2015

6.0

2013

7.7

1994

0.0