Average wages depends on the country you are living in.
USA average wage = $38,000
UK average wage = $43,000
Germany average wage = $43,000
EU average wage = $ 24,450.
Due to taxation people take home different amounts of money. Also in many countries health care is not included in tax.
Also some countries get more paid holidays a year than others.
The US "mean" hourly wage in 2007 was $18.80