This chart and map track recent movements in single-family home sales in Anne Arundel County by ZIP code. The chart list sales volume and median price for the year to date through September. The map reflects the percentage changes between the year-to-date median price for September 1991 and the year-to-date median price for September 1990.

In future weeks, charts and maps will appear for:

* Carroll and Howard counties (Dec. 15);

* Harford County (Dec. 22);

* and Baltimore and Baltimore County (Jan. 5).

The next metro-wide roundup of sales activity will appear Dec. 29. The information is provided by Rufus S. Lusk & Son Inc.