From the Family Caregiver Alliance. According to the newly released World Alzheimer Report 2010: The Global Economic Impact of Dementia from Alzheimer's Disease International (ADI) dementia care would be the world's largest company by annual revenue, exceeding Wal-Mart (414 billion) or Exxon (311 billion). The total worldwide cost is 604 billion in 2010, and 1% of the world's gross domestic product (GDP). If dementia were a country, it would be ranked the 18th largest economy. ADI, a non-profit based in London, is a federation of 73 national Alzheimer's organizations, including the US Alzheimer's Association. By 2030, worldwide societal costs will increase by 85%, and this could be a conservative projection.