1970

6.1

2022

5.6

1989

5.1

2002

6.0

2002

6.9

2015

6.1

1989

7.1

1997

7.7

1973

6.5

1974

7.2

1972

6.2

2002

5.6

1981

6.5

1997

6.6

1984

7.5

1999

6.3

2003

6.1

1990

6.2

1998

6.1