The value $V$, in thousands of dollars, of a certain antique car can be modeled by a quadratic function of the number of years $t$ since 2000. In 2000 ($t=0$), the car's value was 10 thousand dollars. In 2005 ($t=5$), its value was 35 thousand dollars. In 2010 ($t=10$), its value was 60 thousand dollars. What was the value, in thousands of dollars, of the car in 2015 ($t=15$)?