The estimates presented in the NIPA Table 5.5.5U are the most detailed time-series estimates available for investment in private equipment (PEQ). For benchmark years (years ending in 2 and 7), however, more detailed estimates are available from BEA's Input-Output (I-O) accounts. The I-O accounts are used to "benchmark" the time-series estimates of PEQ and present more detailed estimates of the products that make up each PEQ category. A table showing the I-O commodity composition of the products in the PEQ categories for 2007 and 2012 is available here.