The graph below shows the proportion of four different materials that were recycled from 1982 to 2010 in a particular country

The given graph elucidates recycling rates for four distinctive materials over a twenty-eight-year period from 1982 to 2010 in a sole country.
Overall, it can be seen clearly that there were upward trends in recycling four materials while paper & cardboard was recycled the most.
As regards paper& cardboard, it had experienced erratic behavior between 65% and 70% until 1990 before escalating to 80% in 1994 but then its figure continued to slump into 70% in 2010. In a similar fashion, half of the glass containers were recycled in 1982, after experiencing a slight decrease of 10%, its figure then rose to the previous level of 50% in 1994 and constantly augmented to 60% in the end.
With respect to Aluminum cans, it started to be regenerated in 1986 at nearly 5%, and then its percentage soared to just under 50% in 2010. Plastics, however, just undergone a slight rise from around 2% in 1990 to approximately 10% in 2010.