Refer to the Following Table That Shows Monthly Data for Japan

Refer to the following table that shows monthly data for Japan. What was the unemployment rate in December 2017?
$${ \text { Japan } } \\\begin{array} { | l | c | c | c | } \hline \text { Month and year } & \begin{array} { c } \text { Labor force - male } \\\text { (millions) }\end{array} & \begin{array} { c } \text { Labor force - female } \\\text { (millions) }\end{array} & \begin{array} { c } \text { Number of } \\\text { unemployed people } \\\text { (millions) }\end{array} \\\hline \text { January 2014 } & 37.6 & 28.1 & 2.4 \\\hline \text { June 2015 } & 37.7 & 28.6 & 2.2 \\\hline \text { December 2016 } & 38.0 & 29.2 & 2.0 \\\hline \text { March 2017 } & 37.7 & 29.0 & 1.9 \\\hline \text { December 2017 } & 37.8 & 29.7 & 1.8 \\\hline\end{array}$$

A) 2.7%
B) 3%
C) 2.1%
D) 3.6%