The bar chart shows the one city that recycled various types of household waste from 1992 to 2002.
Overall
, the Linking Words
percentage
 of all materials experienced different trends in the time period.  Use synonyms
While
 the Linking Words
percentage
 of Use synonyms
glass
 and paper rose each year, plastic and cans remained almost stable.
It is obvious that the proportion of plastic did not change in 1997 and 2002; Use synonyms
however
, it was a little bit less in 1992, which constituted approximately 15%. The cans, which showed a similar Linking Words
percentage
  in 1997 as in Use synonyms
1992
 in the Punctuation problem
1992,
glass
 and paper.
Regarding the Use synonyms
glass
 Use synonyms
percentage
 of household recycling showed about 15% in 1992 . Use synonyms
By contrast
 , in 1997, the proportion was illustrated just below 30% and rose to around 50% in 2002 .
The Linking Words
percentage
 of recycling paper was Use synonyms
also
 like a Linking Words
glass
. Use synonyms
This
 figure starts with about 15% and in 2002 it rose significantly to around 40%.Linking Words