A study conducted in 2002 by the University of the Philippines revealed that 11% of sexually active people between 18-24 have had sexual interactions with people of the same sex. No further studies on percentage of LGBTs in the Philippines has been done since.
Despite being considered gay-friendly, 61% of Filipinos responded that they do not agree with same-sex marriage being legalized in the Philippines in a study conducted by the Social Weather Stations in March 2018.
Rally on Same Sex Marriage in the Philippines
Philippines is one of the most "gay-friendly" countries in Asia, with 73% of adult Filipinos believing that homosexuality should be accepted into society, that is followed up by Japan who has 54% votes in agreement, and South Korea with 39% in agreement.
Out of the 35 countries in Asia included in the study by the NQAPIA (National Queer Asian Pacific Islander Alliance):
Graph of countries in Asia with anti-discrimination laws.
In the United States, the Williams Institute at UCLA School of Law released a study in 2011 that suggests that >8 million American adults in the US, or 3.5% of the adult population, are LGBT.
In 2013, a study was conducted in Brazil with a sample size of 2,363 Brazilian internet users to find out their sexual orientation. 7% responded to being homosexual, 5% responded bisexual, 1% responded other and 4% did not state their orientation.
A 2015 YouGov survey in the United Kingdoms with a sample size of 1,632 adults showed that 7.6% of the population identify as being part of LGBT.
73 countries around the globe legalize homosexuality, with most countries being in the Middle East, Africa and Asia.
26 countries also legalize same-sex marriage, with the latest being Australia in December 2017. In the Philippines, the government has finalized its decision to not legalize same-sex marriage in the country.
Sources:
Demographics of Sexual Orientation
LGBT Rights around the World
NQAPIA Study on LGBT in Asia-Pacific Region
Same-Sex Marriage Opposition in Philippines