A series of powerpoint slides John used for tutorials, plus postscript versions, can be found at ftp://ftp.scriptics.com/pub/tcl/doc/tut.tar.Z .
... years. For every 100 females there are 104.2 males. For every 100 females age 18 and over, there are 97.8 males. The median income for a household in the town is $78,399, ...