Quarter	Thousands, Seasonally adjusted
2010-03-31	26745
2010-06-30	26875
2010-09-30	30103
2010-12-31	28953
2011-03-31	27085
2011-06-30	27289
2011-09-30	30701
2011-12-31	30941
2012-03-31	36906
2012-06-30	42076
2012-09-30	40562
2012-12-31	45220
2013-03-31	50777
2013-06-30	50145
2013-09-30	52059