ɪn nˈaɪntiːnhˈʌndɹɪd fˈɪftiːn, ɐ kɹˈaʊd ʌv ˈeɪɾi,zˈiəɹoʊzˈiəɹoʊ zˈiəɹoʊ wʌz ɹᵻpˈoːɹɾᵻd ɪn ʃᵻkˈɑːɡoʊ, θɹˈiː wˈiːks ˈæftɚɹ ˈoʊnli sˈɪksti,zˈiəɹoʊzˈiəɹoʊ zˈiəɹoʊ hæd ɐtˈɛndᵻd ðɪ ˌɪndiənˈæpəlˌɪs fˈaɪvhˈʌndɹɪd.
In 1915, a crowd of 80,000 was reported in Chicago, three weeks after only 60,000 had attended the Indianapolis 500.