The average collection efficiency in 2010 was 84%, indicating that 16% of users did not pay their bills.

The collection efficiency is a function of the absorber material and remains to be optimized.

If we just let them go, next thing you know collection efficiency will be down ten percent, then twenty percent.

However, after a tariff increase collection efficiency declined again to 90% in 2010.

Gas-liquid contact - This is one of the most important factors affecting collection efficiency.

These scrubbers have a good collection efficiency for respirable dust.

The instrument did not find much attention in the scientific community at the time due to the lack of light collection efficiency.

As a result, collection efficiency for residential customers increased from 48% to 99.9%.

According to one study, collection efficiency declined again to 65-70% in 2008.

In Sana'a, the collection efficiency of water and sewer bills increased from 60% to 97% during the same period.