1949

7.1

2002

6.1

1974

6.6

2000

6.8

2021

3.2

2018

5.8

1989

6.7

1966

2.1

1973

6.7

1986

6.2

2009

6.1

2017

5.4

2001

7.8

1991

7.2

1999

7.1

2006

5.3

2007

5.9

2008

6.6

1997

6.5

2019

3.3