The major turning points of Amitabh Bachchan’s career were
1969- His debut with Saat Hindustani and his first National award
1971- His first commercial success with Anand and his first Filmfare Award
1973- Amitabh became a star after strings of flops, with Zanjeer
1975- Amitabh dethroned Rajesh Khanna as the top star with a glorious year- 2 major Blockbusters (Sholay and Deewar) and another cult classic hit (Chupke Chupke)
1977- First Filmfare of Amitabh as lead actor- Amitabh as a megastar with massive hits every year.
1982- Amitabh's tragic accident and post recovery starts doing one or two film a year.
1984- Amitabh takes a sabbatical from films to enter politics
1988- Amitabh's return to cinema and the beginning of his decline with massively hyped films that underperformed - Shahenshah, Ganga Jamuna Saraswati, Toofan and his outright disaster film Jadugar.
1990- Won National award for Best Actor for Agneepath but the film flopped- Aaj ka Arjun one of his last solo hit as lead actor (Hum still had Rajnikanth and Govinda)
1992- takes another sabbatical after Khuda Gawah- starts ABCL corporation to produce films and TV. Apart from a delayed film Insaniyat and guest appearances he doesn't appear in a lead role for years.
1997- Amitabh returns to films with Mrutyudata which is a disaster. ABCL fails badly and Amitabh is in massive debts.
2000- second innings of Amitabh Bachchan with Mohabbatein and Kaun Banega Crorepati
2005- Another National award for Amitabh for Black- also wins both Best Actor Popular and Critics award for Black at the age of 63
2009- Another National and Filmfare Award for Paa at the age of 67
2015- National award and Filmfare Critics Award for Piku
83 years old and still getting lead roles- unlike Rajnikanth does meaningful roles and one of the greatest superstars of all times