class   introduced  number in class  number in service  power output (kw)
0    dbr         1980               10                  7                709
1     dc  1978 - 1981               85                 69               1230
2    dft  1979 - 1981               30                 29               1800
3     dh         1979                6                  6                672
4     dl       2010 -               48                 40               2700
5    dsc  1959 - 1967               70                 44                315
6    dsg         1981               24                 24                700
7    dsj         1982                5                  5                350
8     dx  1972 - 1975               49                 46               2240
9    dxr         1993                2                  2               2420
10    ef  1988 - 1989               22                 17               3000
11    tr  1936 - 1978               90                 21                138

Table as JSON:
{"class":{"0":"dbr","1":"dc","2":"dft","3":"dh","4":"dl","5":"dsc","6":"dsg","7":"dsj","8":"dx","9":"dxr","10":"ef","11":"tr"},"introduced":{"0":"1980","1":"1978 - 1981","2":"1979 - 1981","3":"1979","4":"2010 -","5":"1959 - 1967","6":"1981","7":"1982","8":"1972 - 1975","9":"1993","10":"1988 - 1989","11":"1936 - 1978"},"number in class":{"0":10,"1":85,"2":30,"3":6,"4":48,"5":70,"6":24,"7":5,"8":49,"9":2,"10":22,"11":90},"number in service":{"0":7,"1":69,"2":29,"3":6,"4":40,"5":44,"6":24,"7":5,"8":46,"9":2,"10":17,"11":21},"power output (kw)":{"0":709,"1":1230,"2":1800,"3":672,"4":2700,"5":315,"6":700,"7":350,"8":2240,"9":2420,"10":3000,"11":138}}