1967

7.4

1999

7.0

1984

7.1

2000

7.8

2012

7.9

2000

8.1

2002

8.1

1993

7.1

2019

7.1

1982

7.3

2002

8.1

1984

7.7

1986

8.0

1999

7.6

1982

7.2

2002

7.1

1970

7.5

1994

8.2

1989

0.0

2005

6.7