These group of participants are not counted in the country statistics: 1) registrants from the site for student_assistants * student assistants : 14(US), 3(J) * MSU invitations : 3(US) * MSU REU students : 4(US) * travel support special treatment : 1(J: H. Kuniyoshi), 1(E: R. Sukarmadji) * Harsh Mathur (India) will be a student assistant, but registered from the regular site. 2) registrants who did not fill the country column: * all assumed as US participants : 11(US) Country distribution of virtual-only participants: US : 7 Europe : 5 Japan : 2 China : 3 India : 1