71.   The survival rate of twins and triplets has increased in recent years.

72.   The use of illegal drugs - notably Marijuana - has increased in recent years.

73.   The wind had increased in velocity and was now a low, angry howl.

74.   Then the wind began to increase in strength, still from the east and blocking any progress.

75.   They bought a Ferrari knowing that it would increase in value.

76.   Tourism will increase in an aesthetically and ecologically beautiful city.

77.   Visitor numbers increase in the summer.

78.   Weight increases in direct proportion to Mass.

79.   Were merchants and artisans increasing in numbers at the expense of other classes?