trippy_dogs timeline By trippy_dog Period: Jan 1, 1986 to Dec 31, 1986 1986 midyear population 4,953,376,710 Jan 14, 1986 population 1986 Jan 14, 1986 population 1999 Period: Jan 1, 1999 to Dec 31, 1999 1999 midyear population 6.023 billion (1999)