Betting on U.S. Thoroughbred races dropped slightly in March compared to the month's total in 2021, while remaining narrowly ahead through 2022's first three months compared to its pace from the first quarter of 2021, according to Equibase's report of economic indicators released Tuesday. Overall, $942,589,741 was wagered in March, a 2.37% decline from $965,453,678 in March of 2021. The number of race days conducted was nearly identical, with 291 being run this March compared to 292 last year, making the average wagering per race day $3,239,140, down 2.03% from...