HELP! Counting with accountdata!

[Sande]

Hello, i need help to count crimes. The point is all time when i attach this to somescript like carjacker, it does +1 crime to crime count. help, thanks

function add(thePlayer, command)
local account = getPlayerAccount(thePlayer)
setAccountData(account, "crimes", +1) --HOW I CAN + the amount without errors.
end

[XeniusORIGINAL]

function add(thePlayer, command) 
local account = getPlayerAccount(thePlayer) 
local crimes = tonumber(getAccountData(account, "crimes")) or 0 
setAccountData(account, "crimes",  crimes +1) 
end 

[Sande]

Thank you, xenius