tube marking machine，tube marking machine，tube marking machine，tube marking machine，The 2020 Summer Olympic Games are already historic, and not just because they're taking place a year later than scheduled. This year's Olympics feature, by one count, more participants who identify as LGBTQ than at any other Games.At least 168 of the 11,000 Olympians competing in Tokyo this week are openly LGBTQ, according to the SB Nation blog Outsports.Of the 160-plus LGBTQ athletes, some are well-known stars like FIFA Women's World Cup champ Megan Rapinoe, WNBA great Brittney Griner and diver (and newly minted gold medalist) Tom Daley, all of whom came out publicly in the last decade. They're joined by up-and-comers like the Canadian soccer player Quinn and New Zealand weightlifter Laurel Hubbard, both of whom are transgender.The improvement in LGBTQ representation at the Olympics is cause for celebration, but it should also give athletes and audiences pause, said Erik Denison, a behavioral scientist at Monash University in Australia. By Outsports' count, less than 2% of all athletes competing in Tokyo identify as LGBTQ — and, according to Denison, that number is still low. In the US alone, an estimated 4.5% of people are LGBTQ, according to a 2020 count from the Williams Institute, UCLA Law's LGBTQ policy center.