JClarke,
Your statement is incorrect, According to the Swedish method in rounding up coins
Rounding with 5c intervals
This was used in Sweden from 1972 to 1985, New Zealand from 1990 to 2006, and is used in Australia, Bosnia and Herzegovina, Brazil, Finland, Hungary, Malaysia (though 1 sen coins are still legal tender), The Netherlands, Singapore, Switzerland, and sometimes Italy and Turkey (even though the 1 kuruş coin can still be used).
Prices are rounded DOWN to the nearest multiple of 5 cents for sales ending in 1c, 2c, 6c, 7c;
Prices are rounded UP to the nearest multiple of 5 cents for sales ending in 3c, 4c, 8c, 9c;
Values ending in 0c or 5c remain unchanged.