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

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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

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of adult

visitors

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was the highest in the 4 years, followed by

visitors

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under 15,

while

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special exhibition

visitors

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were the

group

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in which the lowest

number

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was revealed. During

this

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period of time, most of the

visitors

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belonged to the adult

group

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

nevertheless

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,

this

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specific

group

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underwent a boost in 2007, with 400.500

visitors

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.

In contrast

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, the lowest rate was for special exhibition

visitors

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.

However

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,

this

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group

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

This

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leaves the

group

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of

visitors

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under age 15. As far as

this

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

number

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