The graph gives illustrates the trend which elderly Americans  in four categories ( reading, thinking,theatre ,watching 
tv
 and surfing the Use synonyms
internet
) in their free time during 3 decades (1980 to 2010).
Use synonyms
Overall
, thinking, reading,watching Linking Words
tv
 and surfing the Use synonyms
internet
 Use synonyms
were
 uptrend after 30 years (from the 1980s to 2010s). Change the verb form
was
Although
, there was a fall in the amount of choosing Theatre of people in the US at the same time. 
With regards to graphs,  reading , watching Linking Words
TV
 and surfing the Use synonyms
internet
 which fluctuates in trending . It can be seen that reading slightly increased reaching around 15% in the 2000s . After the 2000s , there was a dramatic rise in reading  and reaching the top at 40% in the 2010s. From the 1980s to the 2000s , the number of watching Use synonyms
tv
 gradually go up by 10% (from 60% to 70%).Use synonyms
Then
 it drops slowly in the next ten years reaching over 60%.Surfing the Linking Words
internet
 fluctuate from the 1980s to the 2000s , it increase slightly by 10% in the first decade Use synonyms
then
 it rapidly declined to reach the bottom at 20% in the 2000s after that it grew quickly and reached 60% in the 2010s.
In the period the 1980s to 1990s, there go down strongly reaching 30% in the 1990s Linking Words
then
 it gradually go up to nearly 45%  20 years later.There was a dramatic rocket of hiking . it increased 4 times between the 1980s and 2000sLinking Words