member countries             population     area (km square)      gdp (billion us) gdp per capita (us)
0                  denmark                5021861                43094                70.032               59928
1                  ireland                3073200                70273                21.103               39638
2           united kingdom               56210000               244820               675.941               36728
3      accession countries               64305061               358187               767.076               11929
4  existing members (1973)              192457106              1299536               2381396               12374
5               ec9 (1973)  256762167 ( + 33.41%)  1657723 ( + 25.44%)  3148.472 ( + 32.21%)       12262 (0.91%)

Table as JSON:
{"member countries":{"0":"denmark","1":"ireland","2":"united kingdom","3":"accession countries","4":"existing members (1973)","5":"ec9 (1973)"},"population":{"0":"5021861","1":"3073200","2":"56210000","3":"64305061","4":"192457106","5":"256762167 ( + 33.41%)"},"area (km square)":{"0":"43094","1":"70273","2":"244820","3":"358187","4":"1299536","5":"1657723 ( + 25.44%)"},"gdp (billion us)":{"0":"70.032","1":"21.103","2":"675.941","3":"767.076","4":"2381396","5":"3148.472 ( + 32.21%)"},"gdp per capita (us)":{"0":"59928","1":"39638","2":"36728","3":"11929","4":"12374","5":"12262 (0.91%)"}}