Medical equipment consisted of the following as of December 31 (in thousands):

Included in ME in rental service above are $11.2 million and $6.9 million, as of December 31, 2015 and 2014, respectively, of pumps obtained under various capital leases. Included in accumulated depreciation above are $2.4 million and $1.3 million, as of December 31, 2015 and 2014, respectively, associated with the same capital leases.

Depreciation expense for the years ended December 31, 2015 and 2014 was $4.8 million and $3.3 million, respectively, which were recorded in cost of revenues — pump depreciation and loss on disposal.