1985

7.8

1997

7.1

1994

7.8

1998

7.4

2000

8.2

1996

7.8

1975

7.3

2002

7.1

1986

7.7

2016

7.3

1976

7.9

2013

7.4

1991

7.6

1991

7.6

1999

7.0

2024

7.5

1979

6.8

2000

6.2

2004

8.0

2003

7.7