Member countries Population Area (km²) GDP (billion US$) GDP per capita (US$) Languages Denmark 5,021,861 2,209,180 70.032 $59,928 Danish Ireland 3,073,200 70,273 21.103 $39,638 English, Irish United Kingdom 56,210,000 244,820 675.941 $36,728 English Accession countries 64,305,061 2,524,273 767.076 11,929 3 Existing members (1973) 192,457,106 1,299,536 2,381,396 12,374 4 EC9 (1973) 256,762,167 (+33.41%) 3,465,633 (+266.68%) 3,148.472 (+32.21%) 12,262 (−0.91%) 7