1999

7.6

2003

7.2

2002

7.7

1995

6.5

2014

6.4

2003

7.8

2009

6.4

1997

8.1

1952

6.8

1990

6.9

2018

6.9

1998

7.0

2001

8.6

2007

8.2

2020

7.6

2016

8.0

1999

6.7

2019

6.9

2014

6.1

2019

6.6