The chart below gives information about species used for animal testing in the U.S. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The pie chart gives information about the proportions of six types of animals, say,

rabbits

, hamsters, dogs, pigs, primates and sheep, employed by scientific and medical tests in America.

Overall

, it is obvious that all experimental subjects are mammals, in which

rabbits

account for the biggest share

while

sheep is the least popular one in experiments. In experimental tests, 38.7% of them select

rabbits

as testing objectives, ranking first among all species, which,

however

, is followed by hamsters, at 27.7%.

By contrast

, the figure for sheep is only 5.1%, recording the lowest number on the pie chart. The percentage of the left three species combined only comes in at approximately 30%, which is higher than that of

rabbits

, yet lower than the number of hamsters. To be specific, 10.2% of testing targets are used by dogs,

whereas

the percentages of pigs and primates merely stand at 9.3% and 9% respectively.