The number of people who went to cinema

This data illustrates the number of people who went to cinema in Lahore and Karachi from the month of January to October. Talking about Lahore, only 10,000 people visited cinema in January, whereas, in March and August, the number of people who visited cinema remained the same i.e., 30,000. However, the number of people immensely increased to 50,000 in October.
Moving towards Karachi, 40,000 people visited cinema in January. Therefore, there was an increase of 10,000 observed in March. Moreover, a drastic decrease was shown in August, where only 10,000 people visited cinema. Furthermore, again in October 40,000 people visited cinema.