1987

7.3

1976

8.1

1972

8.7

1974

8.6

1990

7.4

1995

8.0

1982

7.8

1999

7.5

2009

6.9

1993

6.4

2005

6.3

1994

7.3

1981

7.2

2015

7.6

2002

5.6

2005

7.2

2019

6.4

1997

5.9

2022

5.0

2019

7.0