REVENUE

The following table summarizes the percentages of our net sales attributable to each of our vertical markets for the three months ended March 31, 2019 and 2018:



	Three Months Ended March 31,
	2019		2018
Construction	59.8	%	58.7	%
Industrial & Utility	20.7		22.1
CIG	19.5		19.2
Total net sales	100.0	%	100.0	%

We had no material contract assets, contract liabilities, or deferred contract costs recorded on the condensed consolidated balance sheet as of March 31, 2019 and December 31, 2018. In addition, for the three months ended March 31, 2019 and 2018, revenue recognized in the reporting period that was included in the contract liability balance at the beginning of the period is not material.

Revenue expected to be recognized in any future year related to remaining performance obligations is not material. As permitted in ASC Topic 606, we have elected to omit disclosure related to performance obligations for revenue pertaining to contracts that have an original expected duration of one year or less, to contracts where revenue is recognized as invoiced and to contracts with variable consideration related to wholly unsatisfied performance obligations.