The Following Table Shows the Enrollment in a Private College $S_{n}$

Multiple Choice

The following table shows the enrollment in a private college for the years 1996 to 2005. Interpret these figures as partial sums, $S_{n}$ , of terms of a sequence, $a_{n}$ , where $\mathrm{n}$ is the number of years since 1995 (so $S_{1}=4449, S_{2}=4478$ , etc.) .
$$\begin{array}{ccccccccccc}\text { year } & 1996 & 1997 & 1998 & 1999 & 2000 & 2001 & 2002 & 2003 & 2004 & 2005 \\\text { enrollment } & 4449 & 4478 & 4528 & 4575 & 4590 & 4562 & 4598 & 4693 & 4740 & 4773\end{array}$$
Which of the following gives the total enrollment in 2004?

A) $S_{9}$
B) $S_{10}$
C) $a_{9}$
D) $a_{10}$