mainly in the cities and largely catered to wealthy customers. Rural citizens and the poor had no choice but to keep their funds at home or on their persons. The original Post Office Savings Bank was limited to deposits of £30 a year with a maximum balance of £150. Interest was paid at the rate of two and one-half percent per year on whole pounds in the account. Similar institutions were created in a number of different countries in Europe, North America, and Japan. One example was in 1881 the Dutch government created the Rijkspostspaarbank (State post savings bank), a postal savings system to encourage workers to start saving. Four decades later they added the Postcheque and Girodienst services allowing working families to make payments via post offices in the Netherlands. 20th century The first decade of the 20th century saw the Panic of 1907 in the US, which led to numerous runs on banks and became known as the bankers panic. Great Depression During the Crash of 1929 preceding the Great Depression, margin requirements were only 10%. Brokerage firms, in other words, would lend $9 for every $1 an investor had deposited. When the market fell, brokers called in these loans, which could not be paid back. Banks began to fail as debtors defaulted on debt and depositors attempted to withdraw their deposits en masse, triggering multiple bank runs. Government guarantees and Federal Reserve banking regulations to prevent such panics were ineffective or not used. Bank failures led to the loss of billions of dollars in assets. Outstanding debts became heavier, because prices and incomes fell by 20–50% but the debts remained at the same dollar amount. After the panic of 1929, and during the first 10 months of 1930, 744 US banks failed. By April 1933, around $7 billion in deposits had been frozen in failed banks or those left unlicensed after the March Bank Holiday. Bank failures snowballed as desperate bankers called in loans that borrowers did not have time or money to repay. With future profits looking poor, capital investment and construction slowed or completely ceased. In the face of bad loans and worsening future prospects, the surviving banks became even more conservative in their lending. Banks built up their capital reserves and made fewer loans, which intensified deflationary pressures. A vicious cycle developed and the downward spiral accelerated. In all, over 9,000 banks failed during