The graph shows the amount of CO2 in the atmosphere has consistently increased without any yearly variation.

The graph shows the amount of CO2 has increased from <320ppm to >400ppm in a 40 year period.

The graph is called the Keeling Curve and shows atmospheric CO2 concentrations starting in 1958. 

The graph is called the Milankovitch Curve and shows the amount of CO2 in the ocean has fluctuated greatly.