In the United States, per capita energy use ________, and energy intensity ________.
1) increased sharply from 1950 to the 1970s but has since declined; has been declining since 1970
2) increased sharply from 1950 to the 1970s but has since declined; decreased from 1950 to the 1970s but has since increased
3) has been increasing since 1950; has been declining since 1950
4) has been increasing since 1950; has also been increasing since 1950
5) was stable from 1950 to 1970 but has since increased sharply; has been increasing since 1950