Tramways ridership statistics (selected years)
| Year | Riders (in millions per year) | 
| 1906 | 7 | 
| 1913 | 9 | 
| 1920 | 13 | 
| 1927 | 28 | 
| 1934 | 30 | 
| 1941 | 72 | 
| 1946 | 50 | 
| 1952 | 133 | 
| 1958 | 172 | 
| 1963 | 191 (all-time high) | 
| 1966 | 181 | 
| 1967 | 154 | 
| 1973 | 145 | 
| 1979 | 150 | 
| 1985 | 120 | 
| 1991 | 123 | 
| 1997 | 101 | 
| 2003 | 81 | 
| 2009 | 84 | 
| 2015 | 68 (est.) | 
| 2019 | 50 (est.) | 
| 2021 | 38 (est. – COVID) | 
| 2022 | 50 (est.) |