Edited files to normalize for length of presidency

The ratio of replacement to establishment appointments is:
1.81310322293
1.50900489513
2.12356961063
1.62072450588
2.0306122449
2.10423928518
2.10912275474
2.37927220571
3.12191272139
3.5435736755
2.25714285714
3.24674365564,
which suggests an increase over time