 Complete the following phrase:  In 1990, CONCACAF renamed and restructured the CONCACAF Championship as the CONCACAF Gold Cup, with the United States hosting the first competition in 1991, and hosting or co-hosting every subsequent iteration of the tournament as of 2021. The host country was the inaugural champion of the eight-team tournament. Mexico dominated the remainder of the decade, winning three consecutive CONCACAF Gold Cup titles in 