Townhouse sales accounted for 2.2% of all Manhattan residential sales, similar to the 2% share in 2009. The townhouse market behaved much like the apartment market. There were 232 sales for the year, down 7.2% from the prior year. Sales have been trending lower since the post-financial crisis high of 326 in 2013, down 28.8% since then. The record year for sales activity occurred in 2007 with 343 sales. With 374 listings…