Has the Percentage of Young Girls Drinking Milk Changed Over $\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\text { Nationwide Food Survey Years }$

Has the percentage of young girls drinking milk changed over time? The following table is consistent with the results from "Beverage Choices of Young Females: Changes and Impact on Nutrient Intakes

$\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\text { Nationwide Food Survey Years }$
$\text { Drinks Fluid Milk }\begin{array}{|l|c|c|c|r|}\hline & 1987-1988 & 1989-1991 & 1994-1996 & \text { Total } \\\hline \text { Yes } & 354 & 502 & 366 & \mathbf{1 2 2 2} \\\hline \text { No } & 226 & 335 & 366 & \mathbf{9 2 7} \\\hline \text { Total } & \mathbf{5 8 0} & \mathbf{8 3 7} & \mathbf{7 3 2} & \mathbf{2 1 4 9} \\\hline\end{array}$

-Consider the following pie charts of a subset of the data above:
Do the pie charts above indicate that milk consumption by young girls is independent of the nationwide survey year? Explain.