distance	recession_velocity
.032	170
.034	290
.214	-130
.263	-70
.275	-185
.275	-220
.45	200
.5	290
.5	270
.63	200
.8	300
.9	-30
.9	650
.9	150
.9	500
1.0	920
1.1	450
1.1	500
1.4	500
1.7	960
2.0	500
2.0	850
2.0	800
2.0	1090