How many centenarian actors, who were on our radar have died since the start of the year then?
A quick Wiki search working back to Jan:
Gianrico Tedeschi, Olivia de Havilland, Amala Shankar, Earl Cameron, Pappukutty Bhagavathar, Susanna Ramel, Armando Francioli, Ida Schuster, Lois Kelly Miller, Zoe Dell Nutter, Suzy Delair, Diana Serra Cary and Kirk Douglas. Vera Lynn and Tao Porchon-Lynch too, even though they weren't known for their acting, and it was also discovered that Doris Merrick and Jeanne Manet had died before the start of the year.
So who does that leave? On my radar (not including any barely notables who don't have an English Wiki page): Renee Simonot, Don Marion Davis, Mary Ward, Marsha Hunt, Norman Lloyd, Caren Marsh Doll, Anne Buydens, Betty Brodel, Marge Champion, Nehemiah Persoff, Orlando Drummond, Arnold Yarrow, Guido Gorgatti, Witold Sadowy, June Spencer and Diana Maggi.
Also Silas Hathaway and Elisabeth Waldo if they haven't died off radar as rumoured.
Adriana Sivieri could be alive but it's looking unlikely now.
Only Maggi, Sadowy and Yarrow became centenarians this year.
So as many centenarian actors have gone this year as there are now still alive. That's pretty excessive, and there's still 5 whole months of the year left!