SELECT Status ,  COUNT(*) FROM roller_coaster GROUP BY Status
Show the different statuses and the numbers of roller coasters for each status.
[Schema (values) (types)]: | roller_coaster |  roller_coaster : roller_coaster_id (text) , name (number) , park (text) , country_id (text) , length (number) , height (number) , speed (number) , opened (text) , status (text) | country : country_id (text) , name (number) , population (text) , area (text) , languages (number);