2011:   16,038,072 gallons

2012:   17,545,666 gallons

2013:   17,569,931 gallons

2014:   17,696,094 gallons

2015:   12,927,506 gallons

2016:   13,705,353 gallons

2017:   13,131,023 gallons

2018:   13, 433,364 gallons

2019:   12,867,972 gallons

2020:   15,064,604 gallons