पिछले 5 वर्षों में आर्टिफिशियल इंटेलिजेंस के विकास को दिखाने के लिए एक समयरेखा बनाएं।
2016: 
- AlphaGo, an AI program from Google's DeepMind, beat Lee Sedol, a world champion Go player.
- AI assistants, like Apple's Siri and Amazon's Alexa, became increasingly popular.

2017: 
- AI-powered chatbots became more advanced and were used in customer service industries, like banking and retail.
- DeepMind's AlphaGo beat the world's number one Go player, Ke Jie.

2018: 
- Google's Duplex AI made headlines for being able to make phone calls and schedule appointments like a human.
- Researchers made significant advances in the development of AI for healthcare, with AI-powered programs able to diagnose skin cancer and predict heart disease risks.

2019: 
- OpenAI's GPT-2 language generator impressed many with its ability to produce coherent and even creative writing.
- AI-powered facial recognition came under scrutiny for ethical concerns, like privacy invasion and potential biases.

2020: 
- AI played a significant role in the fight against COVID-19, with models used to predict the spread of the virus and identify potential treatments.
- The use of AI in predictive policing and facial recognition led to increased protests and calls for regulation.