History of Latvia forests were another export revenue source. On March 27, 1919 the Latvian rublis was introduced with an exchange rate of 1 Latvian rublis equal to 1 ostruble, 2 German marks and 1,5 czar rubles. On March 18, 1920 Latvian rublis was made the only legal currency. Due to high inflation, the new Latvian lats currency was introduced at a rate 1 lat to 50 rublis. In 1923 the Bank of Latvia was established and lats replaced rublis in 1925. Between 1923 and 1930 state budget was with a surplus. On average 25,5% went to defense, 11,2% to education and 23,4%
Latvian lats and 50 santīmu were nickel, while coins of 1 lats and above were in silver, with a purity of 83,5 percent. The Latvian Bank issued notes from 1922 in denominations of 20, 25, 50, 100 and 500 latu. They also issued 10 latu notes which were 500 rubli notes overprinted with the new denomination. The government issued currency notes from 1925 in denominations of 5, 10 and 20 latu. The lats was reintroduced on 5 March 1993, replacing the Latvian rublis, which continued to circulate and kept validity until and including 30 June 1994 at a rate of 200 rubļu