They aren't, most are scored from open play.
The most common statistics kept in soccer are: Games Played, Goals, Assists, Points, Fouls, Cards, Ejections, Shots On Goal, Corner Kicks, Saves and Blocks.
There is no such thing as a "Direct Goal Kick." Goals can be scored from Goal Kicks Goals can be scored from Direct Free Kicks According to FIFA Laws of the Game
Corner Kicks Taken!
9.78% in the 2011-12 season
He has scored 72 goals from free kicks.
I definitely want to know this one. He has scored 9 penalty kicks in a row. How many of his last 9 goals were penalty kicks? Me thinks all of them.
Rogério Ceni of Brazil/São Paulo scored 103 goals in his career. He scored 55 free kicks (the record for a goalkeeper) and 46 penalties (a record for a goalkeeper). José Luis Chilavert is the second goalkeeper to score the most goals with 62 goals he scored a record 8 international goalkeeper goals and is the only keeper to scor a hat trick.
I have scored 39 goals 7 posts and 9 cups more info here ->http://www.myfootballgames.co.uk/game/80/Baggio_s-Magical-Kicks.html
David Beckham against Greece in 2001
This would depend entirely on the modifications to the Laws of the Game that your local league has decided to implement. You would have to inquire with them.