D/H+BBN 2016
2.156 ± 0.020
2.260 ± 0.034
1.0
1.5
2.0
2.5
3.0
3.5
Physical Baryon Density,
Ω
b
h
2
, x 100
D/H+BBN 2001
Boomerang 2002
DASI+DMR 2002
Clusters+SNIa 2002
CBI+DMR 2003
D/H+BBN 2003
D/H+BBN 2012
WMAP9++ 2013
Planck_PR3++ 2018
2.5 ± 0.1
2.1 ± 0.3
2.2 ± 0.3
1.9 ± 0.6
2.3 ± 1.3
2.14 ± 0.20
2.23 ± 0.09
2.223 ± 0.033
2.242 ± 0.014
LAMBDA - September 2018