Irrigation system water usage

With the main backyard work done, and all the irrigation zones repaired (we think, at least for now).  I wanted to find out how much water we use every time we irrigate, by zone.  We did this before, in July 2014.

Our current usage is:

Zone	Gallons	Time
Zone 1	29	45	drip
Zone 2	131	45	drip
Zone 3	146	20	drip
Zone 4	248	10
Zone 5	57	45	drip
Zone 6	266	10
Zone 7	134	10
Zone 8	263	10
Zone 9	156	10
Zone 10	217	10
Zone 11	212	10
Total	1859

An actual running of the system, and reading the meter before and after it ran, only shows 1018 gallons used.  That would be only the non-drip zones, but still it seems too low.