Between 1980 and 1990, the city of Gary in which state lost nearly a quarter of its population?

Between 1966 and 1975, which woman won the Wimbledon singles title six times and also beat Bobby Riggs? Between 1971 and 1985, which artist secretly made more than 240 works depicting his neighbor Helga Testorf? Between 1977 and 1980, which player won a state high school title, an NCAA title and an NBA title? Between 1978 and 1999, Pinin Brambilla Barcilon restored which masterpiece at Santa Maria delle Grazie in Milan? Between 1982 and 1998, which Baltimore Oriole played and started in more than 2,600 consecutive games? Between 1990 and 2000, which state's population increased by about 66 percent, the most of any state? Between about 1325 and 1500, which people expanded from an island city to control much of Mexico? Between April and June of 1945, one of World War II's bloodiest campaigns was fought on which Pacific island?