Does " this year and last" mean " this year and last year"?

Context:

The development in Vermont is important because it now puts the US on the map of governments taking a stance against a practice that has led to bountiful crops and food production but has stirred concerns about the dominance of big agribusiness and the potential for unforeseen effects on the natural environment. Some scientists and activists worry about potential effects on soil health and pollination of neighboring crops.
Twenty-nine other states have proposed bills this year and last to require genetically modified organism — or GMO — labeling, according to the National Conference of State Legislatures. Two other New England states have passed laws to require GMO labeling, but the legislation takes effect only when neighboring states also approve the requirement. They are Maine and Connecticut; neither neighbor Vermont.