How much is invested each year to keep the panama canal going?

Almost 2.6 billion U.S. dollars was the toll revenue generated by the Panama Canal during the fiscal year 2019 (from October 2018 to September 2019), up from around 2.5 billion U.S. dollars reported a year earlier. Around 46.2 percent of that revenue was generated by tolls from container vessels

answer: i looked it up

explanation: in 1955 in montgomery, alabama, a girl refused to give up her seat on a public bus. the girl was black, and the passenger looking to take her seat was white. this is a familiar tale, but it's not about rosa parks. the girl in the story is a 15-year-old high school student named claudette colvin, and this act of defiance occurred nine months before rosa parks did the same thing. colvin was arrested, and her case is what led to the u.s. supreme court's order for the desegregation of alabama's bus system. so, why don't we know colvin's name? "later i had a child born out of wedlock; i became pregnant when i was 16," colvin says. "and i didn't fit the image either, of, you know, someone they would want to show off.