The reason for choosing a line graph is that it allows for easy visualization of trends over time. If the number of falls is increasing, decreasing, or staying the same over the $12$ month period, this will be clearly visible on a line graph.

Remember, the key to creating a useful database and chart is to ensure that your data is accurate and up$-$to$-$date. Regularly update your database with the latest information to keep your chart relevant and useful.