According to past annual reports, we have decreased our available seat miles (ASM) only twice in our history. Once, from 1972 to 1973 and again, ever so slightly, from 1987 to 1988.
1972 - 263,808
1973 - 260,616
Decrease of 1.2 percent
1987 - 13,331,055
1988 - 13,309,044
Essentially flat, but literallly a decrease of .1 percent
Otherwise, we have always had a year-over-year increase in ASM capacity.