Al Ring Received a Memo Requesting That He Complete a Trend

Al Ring received a memo requesting that he complete a trend analysis of the following, using 2014 as the base year. (Round each percent to nearest whole percent.)Can you help Al with this request?
$$\begin{array} { | l | l | l | l | l | } \hline & 2017 & 2016 & 2015 & 2014 \\\hline \text { Sales } & \$ 42,000 ( \mathrm {~A} ) & \$ 60,000 ( \mathrm { D } ) & \$ 80,000 ( \mathrm { G } ) & \$ 95,000 ( \mathrm {~J} ) \\\hline \text { Gross Profit } & \$ 21,000 ( \mathrm {~B} ) & \$ 28,000 ( \mathrm { E } ) & \$ 42,000 ( \mathrm { H } ) & \$ 60,000 ( \mathrm {~K} ) \\\hline \text { Net Income } & \$ 21,000 ( \mathrm { C } ) & \$ 32,000 ( \mathrm {~F} ) & \$ 38,000 ( \mathrm { I } ) & \$ 35,000 ( \mathrm {~L} ) \\\hline\end{array}$$ *For simplicity, operating expenses have been omitted.