1986

7.7

2004

8.6

2005

8.2

2003

7.6

2014

5.3

1998

6.2

1983

5.0

1986

6.0

1999

5.7

1979

6.5

1976

6.7

2002

7.5

2004

7.0

1994

7.5

2019

7.3

2021

4.0

2004

6.0

1969

6.5

2006

4.2

2023

5.3