Margarita, I'm serious, if this chart 50 years already, you can not stand it more than W months, and then the rules must be respected, of course, if you wish to save more years 50-100.
http://www.nplu.kiev.ua/ua/events/2007/posibnik/31.htm
[color="# 666686"]Added after 1 minute[/color]
I have somewhere a technique, if I find something I will share with you.
[color="# 666686"]Posted 12 minutes[/color]
I found here in more detail.
http://jenny-jenn.narod.ru/text_rest/doklad.htm
[color="# 666686"]Added after 14 minutes[/color]
On this see paragraph 3
[color="# 666686"]Posted 27 minutes[/color]
Wrong expressed \, if graph 50 years \ - do not, at least a year.