The document summarizes key facts from the 2019 Artificial Intelligence Index annual report. It states that AI research papers have grown over 300% between 1998 and 2018, global private AI investment was over $70 billion in 2019, and the time to train image classifiers has decreased dramatically. It also notes increasing investment in AI startups, exponential growth of AI computing power, and debates around the ethical use of technologies like facial recognition. Concerns are raised about ensuring AI is developed and used responsibly and for benefit of humanity. Trust in AI and governance of it are highlighted as important challenges that remain.