The chart below shows the numbers of three types of visitors to a museum between 1997 and 2012. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The bar chart given compares the

number

of three types of sightseers visiting a museum across the 15-year period from 1997 to 2012. If we take the three different groups in combination, it was striking that the

number

of adult

visitors

was the highest in the 4 years, followed by

visitors

under 15,

while

special exhibition

visitors

were the

group

in which the lowest

number

was revealed. During

this

period of time, most of the

visitors

belonged to the adult

group

, in which the average proportion was approximately 340.000 per year;

nevertheless

,

this

specific

group

underwent a boost in 2007, with 400.500

visitors

.

In contrast

, the lowest rate was for special exhibition

visitors

.

However

,

this

group

saw a significant increase throughout the years, with 1997 being 30.100 and rising to 42.000 in 2012, the latest year.

This

leaves the

group

of

visitors

under age 15. As far as

this

category is concerned, it experienced a decrease throughout the year. The

number

was 120.000 in 1997 but reduced to only 82.300 in 2012.