The graph presents how many percent of the team workers were reached by 4 companies between 2003 and 2006. Overall, it can be observed that graphs separately show fluctuations. There was an increase of nearly 10 percent, the maximum increase is 15 and the minimum 2.
Graph A had a slight fall after 2004 and grew from 28 to 34. The B graph fluctuated in the gap of 25-28, falling gradually before 2005, then grew from 25 to nearly 28 in one year. Graph D decreased slightly before 2004, reached a low of less than 20 percent of staff, and increased sharply to 18 percent after. The third line reaches a peak in 2004, so it grows from 25 to 36, then drops steadily to 31. All graphs rose after 2005 by nearly 5 percent of trained workers. The percentage of A, C, and D graphs at the final point showed near to each other meaning.
Finally, there’s an upward trend in the percentage of practiced employees of different companies.