 
 <translate> Context: Capita was formed 1984 as a division of the non-profit CIPFA (Chartered Institute of Public Finance and Accountancy). In 1987 it became an independent company with 33 staff as a result of a management buy-out, led by Rod Aldridge, and was first listed on the London Stock Exchange in 1991.

Question: when was capita fully listed as a public company on the london stock exchange?
Steam of consciousness below:
 <ibo> Ihe gbara ya gburugburu: E guzobere Capita na 1984 dị ka ngalaba nke CIPFA na-abụghị uru (Chartered Institute of Public Finance and Accountancy). N'afọ 1987, ọ ghọrọ ụlọ ọrụ nwere onwe ya nwere ndị ọrụ iri atọ na atọ n'ihi nzụta njikwa, nke Rod Aldridge duziri, ma debanye aha ya na London Stock Exchange na 1991.  Ajụjụ: olee mgbe e depụtara capita n'ụzọ zuru ezu dị ka ụlọ ọrụ ọha na eze na London Stock Exchange? Steam nke ịmara n'okpuru: 