The graph shows the percentage of different age groups of cinema visitors in a particular country from 1978 to 2008.
Summarise the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words.
![](https://daxue-oss.koocdn.com/upload/ti/sardine/2655000-2656000/2655157/9e1db835eb4d4f74b6f6029045984b24.png)