What documentaries with long shooting time span are worth recommending?

"Seven Years of Life", the following is an introduction from Baidu Encyclopedia:

Seven Years of Life (formerly known as 7 Up in English) is a documentary produced by ITV, directed by michael apted and starring Bruce Balden, Jacqueline Bassett and Simon Bassett.

Michael Apter's first documentary series began at 1964. 1964, michael apted filmed the documentary "7 Up" for the British BBC TV station, and interviewed fourteen seven-year-old children from different classes in Britain, some from orphanages and some from upper class. After that, every seven years, Apter will interview these children again, listen to their dreams and talk about their lives. Forty-nine years old, I know my destiny, see through the passage of time and the vicissitudes of life. This film combines interviews with interviewees aged seven, fourteen, twenty-one, twenty-eight, thirty-five, forty-two, forty-nine and fifty-six. In 2006, Seven Years of Life was nominated for the British Film Academy Award and the Golden Satellite Award. ?