What five sodas are the most carbonated?

1. Sprecher Root Beer (3.55 volumes of CO2)

2. Boylan's Black Cherry Soda (3.45 volumes of CO2)

3. Virgil's Root Beer (3.35 volumes of CO2)

4. IBC Root Beer (3.25 volumes of CO2)

5. A&W Root Beer (3.15 volumes of CO2)