Between 1920 and 1959, 30-50% of all Americans traveling to the Caribbean visited Havana, Cuba, which had the best sanitary conditions and a pleasant climate. Over 1.7 million American tourists visited Havana in the 1950s for gambling, drinking and other amusements. In 1961, the US broke diplomatic relations with Cuba and banned travel there, causing American visitors - 90% of tourists at the time - to disappear abruptly. Cuba has since diversified its tourism industry and increased its hotel capacity and quality while tourism income has increased many times over.