The list also includes the performance for the the second quarter in those years and for the full year. In 9/10 years the S&P was positive for the rest of the year after a strong first quarter. The second quarter has seen a drop in performance from the first quarter every time though.
It should be noted that the only year that the S&P wasn't positive after the first quarter was 1987, the year of Black Monday. Also, 1998 was the year of long term capital--the index fell back to flat in September, but made all of its ground back in the 4th quarter.