1992

6.3

1975

6.8

2002

6.5

2001

5.9

2003

5.7

1988

7.3

2007

6.9

2018

6.2

1971

7.5

1981

7.1

1986

5.8

2001

6.9

1989

5.8

2021

4.9

2005

6.1

2019

0.0

1972

7.4

2004

7.5

1968

3.7

2000

5.8