Here is a graph of expenditures on energy goods and services as a percent of total personal consumption expenditures through February 2016.
This is one of the measures that Professor Hamilton at Econbrowser looks at to evaluate any drag on GDP from energy prices.
Click on graph for larger image.
Data source: BEA Table 2.3.5U.
The huge spikes in energy prices during the oil crisis of 1973 and 1979 are obvious. As is the increase in energy prices during the 2001 through 2008 period.
In February 2016, with WTI oil prices averaging $30.32 per barrel, energy expenditures as a percent of PCE declined to an all time low of just under 3.7%.