Copying data from multiple worksheets to a master worksheet

Hi, I'm a beginner at Excel, so please bear with me.

I have a workbook with multiple worksheets. Each worksheet is a set o data from a certain year. I want to create a macro that automatically copies the data from these worksheets into a master worksheet that can easily be used to make a pivot table. How can I do this? (I included a sample workbook in the attachments.)