d1870s.txt     61735 11-11-95  Format of files is:
d1880s.txt    109567 11-11-95  D for solar disk area covered
d1890s.txt    109553 11-11-95  Year of start of decade
d1900s.txt    109204 11-11-95  Year of start of decade
d1910s.txt    109549 11-11-95  Year of start of decade
d1920s.txt    109579 11-11-95  Year of start of decade
d1930s.txt    109477 11-11-95  Year of start of decade
d1940s.txt    109575 11-11-95  Year of start of decade
d1950s.txt    109561 11-11-95  Year of start of decade
d1960s.txt    109566 11-11-95  Year of start of decade
d1970s.txt    109528 11-11-95  Year of start of decade
d1980s.txt    109551 11-11-95  Year of start of decade
d1990s.txt     63862 11-11-95  Year of start of decade
ss_area.n_s     6433 10-24-95  N-S hemisphere relative values