2019

7.8

1970

6.8

1988

5.2

2009

5.8

1998

6.0

1968

7.8

1996

5.9

1989

5.5

2003

6.3

2007

6.3

2000

5.8

1987

6.9

2000

5.2

1992

6.6

1980

6.1

2015

6.6

1985

7.8

1965

7.5

1982

7.9

1957

6.2