is required to measure distances and

0.125998 4% Est. 1995 1.860317 0.537543 4% Est. 2003 14.843022 0.067372 4% Est. 1990 8.621190 0.115993 4% Est. 2007 17.364245 0.057590 4% Est. 1998 1.315932

doubtless