`year` smallint(5) UNSIGNED NOT NULL, # quota year
`month` tinyint(3) UNSIGNED NOT NULL, # quota month
`minutes` int(11) default NULL, # quota in minutes in specified month and year
`year` smallint(5) UNSIGNED NOT NULL, # quota year
`month` tinyint(3) UNSIGNED NOT NULL, # quota month
`minutes` int(11) default NULL, # quota in minutes in specified month and year