significant part of retail sales Federal Reserve Board report Federal Reserve Board report survey Federal Reserve Board report reports Figure 5 According to the Fed Federal Reserve Bank of San Francisco Federal Reserve Bank of San Francisco Federal Reserve Board report new report Figure 1 Figure 10 cash-use study. Federal Reserve Bank of San Francisco Source Federal Reserve This recently published article 40% of payments Federal Reserve Board report Cash usage encuesta Federal Reserve Board report Figure 3 encuesta Figure 4 about 40% of retail purchases were made using cash encuesta Federal Reserve Bank study and 9 un estudio de la Reserva Federal de San Francisco a study 40% of payments Source Figures 8