The table above is expressed in terms of cumulative percent changes. These changes refer to the percent difference between the relevant cumulative total for 2014 and the total for the same months in 2013. For example, the March pneumatic shipments figure of 4.8 means that for the calendar year through March 2014, pneumatic shipments increased 4.8% compared to the same time period in 2013 (Base Year 2013 = 100).