Plastic

7.2

/

2015

6.4

/

2012

6.7

/

2007

7.346

/

1992

7.029

/

1996

7.054

/

1987

7.06

/

1999

8

/

1997

7.296

/

1980

6.848

/

2000

7.368

/

2010

7.979

/

1966

8.1

/

2013

6.3

/

1987

8.215

/

2009

8.3

/

1989

6.239

/

2004

8.223

/

1999

7.5

/

1968

8.042

/

2014