1968

6.2

1982

5.3

1980

6.1

1980

6.5

2014

6.8

1973

7.0

2003

7.9

1985

5.5

1976

5.2

2007

5.9

1964

6.1

2016

2.0

1965

6.0

2017

6.4

2025

0.0

1977

0.0

2019

0.0

2022

9.0

2014

0.0

1964

5.7