The bar graph presents the figure for some kinds of household waste which were recycled in a city over a period of 10 years, starting from 1992.
Overall, it is clear that the percentage of some types of household waste recycle increased over the period except that of cans. The figure for cans was highest in 1992, while in 2002 the highest percentage was glass.
In 1992, the statistics of Cans was the highest, at around 18%, while the figures for paper and glass were lower, at around 15% and 16% respectively. The data of plastic was the lowest in 1992, at 12%. In 1997, the proportion of Paper rose to more than 30%, which was the highest figure in that year, while that of Cans witnessed a decrease to below 15%. The percentages of glass and plastics developed to around 30% and 12% respectively.
In 2002, the figure for Glass increased by 20%, reaching a total of 50%, and got the top of figure for waste recycle. The percentage of Cans’ recycle increased back to the figure in 1992, at 18% while the data of paper developed to around 40% in 2002 . The figure for Glass remained unchanged from 1997 to 2002, at approximately 15%.