The charts illustrate how the 
proportion
 of five different kinds of books, which were sold in a particular bookseller in Use synonyms
years
 1972,1992 and 2012.
   Correct article usage
the years
Overall
, Linking Words
adult
 Use synonyms
fiction
 and children’s Use synonyms
fiction
 witnessed an upward trend, Use synonyms
while
 biography, travel and other kind of books saw a downward trend. Linking Words
Additionally
, Linking Words
adult
 Use synonyms
fiction
 during the most period had the highest Use synonyms
proportion
.
     At the beginning of the period, Use synonyms
adult
 Use synonyms
fiction
 and children’s Use synonyms
fiction
 made up a-fifth of the total Use synonyms
proportion
, each. Use synonyms
Consequently
, the figure for Linking Words
adult
 Use synonyms
fiction
 rose to 25% in 1992, before increasing rapidly to almost  half in 2012. Use synonyms
Similarly
, there was a slight growth to 25% for the figure of children’s tails.
    The Linking Words
proportion
 of travel books started at 15% in 1972, Use synonyms
then
 it grew slightly to 18% in 1992, before a drop to just a tenth. Biography and other kind of book, beginning with 20% and 25%, respectively. Both experienced a decrease of 10%, before a drop to the lowest point at 8% for the figure of biography and 12% for the share of another bookbook.Linking Words