Total U.S. convertible registrations reached 296,433 units for the 2003 calendar year, a 2.3 percent decrease compared with 2002, according to market researcher RL Polk. After experiencing strong growth in the late 1990s peaking in 2001 with over 310 thousand units, the U.S. convertible market has slowed in recent years, off 4.6 percent in the 2003 calendar year from its recent high-water mark.