the graph below shows the statisfaction of staff in four colleges between 1991 and 2002

Presented is the chart illustrating the satisfaction ranking of four colleges’ staffs between 1991 and 2002. Overall, it is readily apparent that, while surveyed data of college B and C witnessed an upward trend, the opposite was true compared to those of college A and D. To begin, in 1991, the proportion of the level of satisfaction in college B was just above a half, which approximately doubled that of college C, about 30%. Until 1967, there was a fluctuation around 60% and 50% in the figure for college B before reaching a peaked at just under 65% then increased slightly with minimal acceleration to 70% in 2002, whereas the last spike reached 10% in 1998, then escalated by 7 times in 1999 and reached a lion’s share of 80% in 2002. Regarding college A and D, while the situation of college A tapered at 80% in 1995 and the figure for college D was plateaued at around 35%-40% over a decade from 1991 to 2001, there was an overwhelming decline by half in both objects.