The pie graphs illustrate various types of 
courses
 for students in three separate years, 1984, 1994, and 2004. Use synonyms
Overall
, face-to-face Linking Words
courses
 contributed the largest share throughout the survey, Use synonyms
whereas
 online Linking Words
courses
 had the smallest. Use synonyms
Moreover
, online Linking Words
courses
 emerged as a new category in 1994. 
 The figure for face-to-face Use synonyms
courses
 ranked first in 1984 (67 %) and declined by 13% in 1994 before declining slightly to 40% in 2001. In comparison, the percentage of mixed media was responsible for 13%, which was followed by a dramatic increase to 35% in 2004.
In the first year, the share of correspondence was 20% of the total, after which it levelled off for five years. Use synonyms
This
 is followed by a noticeable fall of 5% in the Linking Words
last
 year. At Linking Words
first, 
online Linking Words
courses
 were not part of the options, followed by a considerable growth to 11 % before declining minimally by 1 per cent in the end.Use synonyms