This relationship has carried through to the 21st century, as reflected by the Caribbean Basin Trade Partnership Act. The Caribbean Basin is also of strategic interest in regards to trade routes; it has been estimated that nearly half of US foreign cargo and crude oil imports are brought via Caribbean seaways. During wartime, these figures only stand to increase. It is important to note that the United States is also of strategic interest to the Caribbean. Caribbean foreign policy seeks to strengthen its participation in a global free market economy. As an extension of this, Caribbean states do not wish to be excluded from their primary market in the United States, or be bypassed in the creation of "wider hemispheric trading blocs" that stand to drastically alter trade and production in the Caribbean Basin. As such, the US has played an influential role in shaping the Caribbean's role in this hemispheric market. Likewise, building trade relationships with the US has always figured in strongly with the political goal of economic security in post-independence Caribbean states.