Substantial increases were made in social security benefits such as injury and sickness benefits, pensions, unemployment benefits, housing allowances, basic subsistence aid allowances, and family allowances and living allowances. In the governments first budget, sickness benefits were increased by 9.3%, pensions for war widows by 25%, pensions for the war wounded by 16%, and retirement pensions by 5%. Numerically, pensions went up by 6.4% (1970), 5.5% (1971), 9.5% (1972), 11.4% (1973), and 11.2% (1974). Adjusted for changes in the annual price index, pensions went up in real terms by 3.1% (1970), 0.3% (1971), 3.9% (1972), 4.4% (1973), and 4.2% (1974). Between 1972 and 1974, the purchasing power of pensioners went up by 19%. In 1970, war pensions were increased by 16%. War victim’s pensions went up by 5.5% in January 1971, and by 6.3% in January 1972. By 1972, war pensions for orphans and parents had gone up by around 40%, and for widows by around 50%. Between 1970 and 1972, the “Landabgaberente” (land transfer pension) went up by 55%. Between 1969 and 1974, the average real standard rate of income support rose (in 1991 prices) from around 300 DM to around 400 DM. Between 1970 and 1974, unemployment benefits rose from around 300 euros to around 400 euros per month, and unemployment assistance from just under 200 euros per month to just under 400 euros per month. In 2001 prices, the average standard social assistance benefit level rose from around 200 euros per month in 1969 to over 250 euros per month in 1974. During most of Brandt’s years as chancellor, the majority of benefits increased as a percentage of average net earnings.
Question: How many years did unemployment benefits rise from around 300 euros to around 400 euros per month?
Answer: 4