leader                               party              leader 's seat  number of seats       leader since
0     peter robinson           democratic unionist party                belfast east               38        31 may 2008
1  raymond mccartney                           sinn fãin                       foyle               29               2011
2        tom elliott               ulster unionist party  fermanagh and south tyrone               16  22 september 2010
3   margaret ritchie  social democratic and labour party                  south down               14    7 february 2010
4         david ford  alliance party of northern ireland                south antrim                8               2001
5       steven agnew     green party in northern ireland                  north down                1               2010
6       jim allister          traditional unionist voice                north antrim                1               2007

Table as JSON:
{"leader":{"0":"peter robinson","1":"raymond mccartney","2":"tom elliott","3":"margaret ritchie","4":"david ford","5":"steven agnew","6":"jim allister"},"party":{"0":"democratic unionist party","1":"sinn fãin","2":"ulster unionist party","3":"social democratic and labour party","4":"alliance party of northern ireland","5":"green party in northern ireland","6":"traditional unionist voice"},"leader 's seat":{"0":"belfast east","1":"foyle","2":"fermanagh and south tyrone","3":"south down","4":"south antrim","5":"north down","6":"north antrim"},"number of seats":{"0":38,"1":29,"2":16,"3":14,"4":8,"5":1,"6":1},"leader since":{"0":"31 may 2008","1":"2011","2":"22 september 2010","3":"7 february 2010","4":"2001","5":"2010","6":"2007"}}