Overall,
From...to
Between...and...
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Increasing/Rising gradually/steadily
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Decreasing/Declining gradually/steadily
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Remaining flat/stable
Increased by 100%
Doubled
Increased twofold
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Increased dramatically; rocketed; skyrocketed; soared
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Reached a peak, high point, zenith
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Dropped dramatically; started to decrease dramatically
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Plummeted; plunged; fell away dramatically
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Hit a low; hit a low point; reached a nadir.
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Fluctuated; was erratic; a period of fluctuation
While; whereas; on the other hand; in contrast; by contrast; however...
