Determining the Mode of a Dataset

At a school, a survey was conducted to analyze the distribution of the number of books read by students in a month. The results from 30 students are as follows:

2, 4, 5, 3, 6, 7, 4, 2, 5, 1, 2, 8, 5, 3, 2, 4, 6, 7, 5, 5, 9, 3, 2, 4, 8, 6, 5, 7, 3, 2

Using the data collected, calculate the mode of the dataset.