1997

7.1

1987

8.1

1998

5.6

2012

5.2

1979

8.3

2014

4.4

2002

6.6

1996

6.1

1986

6.9

2005

5.4

1998

6.4

2016

6.2

2007

5.6

1992

4.1

2021

7.5

2014

4.8

1997

4.3

1997

6.1

2000

5.5

2008

6.7