Bikesharing is growing in Houston.

The city's B-Cycle program that launched in 2012 with just three stations has dramatically expanded, both in terms of stations and usage.

In the first six months of this year, B-Cycle logged more than 43,500 checkouts, according to data published by the Houston Chronicle. The system now has 29 stations, well above the three stations it launched with in 2012. Program administrators hope to expand the program to include 100 stations by 2017.

In the month of June alone, the program averaged 220 checkouts per day.

The B-Cycle program allows riders to check out bikes with a daily, monthly or annual pass. Costs range from just $5 for the day to $65 for an annual membership. Once they have a membership, each time a rider checks out a bike it's free for the first hour and $2 for every 30 minutes after that.

So what's the most popular spot to check out a bike? The Houston Zoo station nabbed that honor, with more than 4,500 checkouts in the first six months of the year. The Sabine Bridge and Spotts Park kiosks, both on Buffalo Bayou, ranked second and third.

Read more on the Houston Chronicle and check out the full list of stations on the B-Cycle site