I found the following information in Wikipedia. When I first created this puzzle, I used a few random notes I had taken. I apologize for being sloppy. Hopefully the puzzle will work better now.
The Australian Penny was a coin of the Australian pound prior to 1966. It was worth one twelfth of an Australian shilling and 1/240 of an Australian pound. The coin was equivalent in its dimensions, composition and value to the British penny, as the two currencies were fixed at par. The coin was first introduced in 1911, and stopped being minted in 1964, with the introduction of decimal currency.
With pounds, shillings and pence to be replaced on 14 February 1966, many names for the new currency were suggested. In 1965, the Prime Minister, Sir Robert, Menzies, a monarchist, wished to name the currency the royal. Other proposed names included the austral, the oz, the boomer, the roo, the kanga, the emu, the digger, the Quid, the dinkum and the ming (Menzies's nickname). Menzies's influence resulted in the selection of the "royal," and trial designs were prepared and printed by the Reserve Bank of Australia. The name for the currency proved unpopular and was later dropped in favour of the dollar.
In 1966, coins were introduced in denominations of 1, 2, 5, 10, 20 and 50 cents. The initial 50 cent coins contained high silver (80%) content and were withdrawn after a year after it was found that the intrinsic value of the silver content exceeded the face value of the coins. One-dollar coins were introduced in 1984, followed by two-dollar coins in 1988. The one- and two-cent coins were discontinued in 1991 and withdrawn from circulation.
Prior to the introduction of the New Zealand dollar in 1967, the New Zealand pound was the currency of New Zealand, which had been distinct from the pound sterling since 1933. The pound was divided into 20 shillings and one shilling was divided into 12 pence. Switching to decimal currency had been proposed in New Zealand since the 1930s, although only in the 1950s did any plans come to fruition. In 1957, a committee was set up by the Government to investigate decimal currency. The idea fell on fertile ground, and in 1963, the Government decided to decimalise New Zealand currency. The Decimal Currency Act was passed in 1964, setting the date of transition to 10 July 1967.
On the introduction of the dollar, coins came in denominations of 1c, 2c, 5c, 10c, 20c, and 50c. The 1c and 2c coins were bronze. In 1986, New Zealand adopted a new portrait of the Queen. The 1c and 2c coins were last minted for circulation in 1987, with collector coins being made for 1988. The coins were demonetised on 30 April 1990.
Production of the Canadian penny ceased in May 2012, and the Royal Canadian Mint ceased the distribution of them as of February 4, 2013. However, like all discontinued currency in the Canadian monetary system, the coin remains legal tender. Once distribution of the coin ceased, though, vendors no longer were expected to return pennies as change for cash purchases, and were encouraged to round purchases to the nearest nickel. Non-cash transactions are still denominated to the cent.
Canada stopped producing pennies in 201X.
New Zealand stopped minting pennies (one cent coins) in 1CAD except for collector coins produced in 1CAB.
Australia stopped minting pennies (pence of the Australian pound) in 1CEF.
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