With last week's release of year-end presidential contribution data, we return with an update to our ZIP code donor application, which allows readers to explore where each major candidate received support across the state.

Despite having only four and a half months of time active as a presidential candidate in 2011, Gov. Rick Perry took advantage of his well-established fundraising network and overwhelmingly outperformed his opponents, raising $10.8 million last year. Perry's haul represents half of the total money given in Texas to all candidates ($21.6 million).

After Perry, President Obama had the second biggest pick-up in Texas with $3.7 million. Former Massachusetts Gov. Mitt Romney and U.S. Rep. Ron Paul are the only other candidates to break through $1 million, raising $3 million and $1.5 million, respectively.

Click on candidates' names to the right of the map to view their donations. Use the zoom drop-down on the left to take a closer look at some high-donor cities in the state (by default it starts at Houston). To switch between visualizing the amount donated and the number of donors, use the drop-down on the right. If no one from a ZIP code contributed to any candidate, there will be no shape to represent it.

Click on a ZIP code shape to see how many donors and and how much money was donated from that area.