Give me a bulleted list of the last eight female Olympians to win the 200m freestyle.
Here is a list of last eight females to win the 200m freestyle race at the Olympics. 
- Ariarne Titmus (2020 Tokyo)
- Katie Ledecky (2016 Rio de Janeiro)
- Allison Schmitt (2012 London) 
- Federica Pellegrini (2008 Beijing)
- Camelia Potec (2004 Athens)
- Susie O'Neill (2000 Sydney)
- Claudia Poll (1996 Atlanta)
- Nicole Haislett (1992 Barcelona)