1.1990 (9 Countries)
1990 (MCMXC) was a common year starting on Monday of the Gregorian calendar. It was the 1990th year of the Common Era (CE) and Anno Domini (AD) designations, the 990th year of the 2nd millennium, the 90th year of the 20th century, and the 1st year of the 1990s decade.
In 1990, the reunification of East and West Germany marked a historic moment in the aftermath of the Cold War. Tim Berners-Lee, a British computer scientist, introduced the concept of the World Wide Web, revolutionizing the way people access and share information. Nelson Mandela's release from prison in South Africa signaled the beginning of the end of apartheid.
2.1995, and 1998 (6 Countries)
3.2004 (5 Countries)
2004 was a leap year that began on a Thursday in the Gregorian calendar. It was the 2004th year of the Common Era and of the Anno Domini designations. Major events in 2004 included the Athens Summer Olympics and the Indian Ocean earthquake and tsunami in December.
4.1979, and 2009 (4 Countries)
5.1978, 1989, 1991, 1992, 2000, 2002, 2007, and 2015 (3 Countries)
6.1981, 1986, 1993, 1994, 1999, 2005, 2006, 2012, 2016, 2021, and 2022 (2 Countries)
7.1863, 1865, 1877, 1903, 1906, 1907, 1910, 1928, 1949, 1956, 1962, 1966, 1968, 1969, 1972, 1973, 1976, 1980, 1982, 1985, 1988, 1996, 1997, 2008, 2010, 2014, 2017, 2019, and 2020 (1 Country)
