In the recent past, Exxon has added considerably more natural gas than liquids to its reserves, with the demand for natural gas expected to increase at a faster rate than for crude oil.
The unemployment rate actually rose, to 9.1%, in May: the rate of job creation is barely keeping track with the naturalincrease in the working-age population.
Two specific types of immune system cell that attack invaders - CD4 T-cells and natural killer cells - increased in number with age, with a higher rate of increase in women than in men.