The graph is 100x100, with the first 2 digits of the PIN on the y-axis and the last 2 on the x-axis, and a lighter color means that combination is more frequent. Some interesting notes:

- the bright diagonal line is PINs where the first 2 numbers and the last 2 numbers repeat (ex, 1111 or 5959)
- There is a bright horizontal line at PINs starting with 19 and the starting of another at PINs starting with 20 for people that use their birth year as a PIN, with 1980 being the brightest
- the lower left is much brighter than the rest of the chart from people that use different combinations of their birthday
- 1234 and 4321 are very bright
- Out of 10,000 numbers, the top 20 PINs make up over 25%
- There are some really dark spots indicating that there are a few PINs that hardly anybody uses.