proj letter	# of downloads	% of downloads
a	1421156	5.3%
b	1160211	4.4%
c	1408543	5.3%
d	1175742	4.4%
e	980011	3.7%
f	1170546	4.4%
g	1542094	5.8%
h	476949	1.8%
i	758869	2.8%
j	1347860	5.1%
k	575091	2.2%
l	972408	3.7%
m	1827861	6.9%
n	730081	2.7%
o	1275361	4.8%
p	2354475	8.8%
q	282724	1.1%
r	652751	2.5%
s	2230872	8.4%
t	1123265	4.2%
u	381130	1.4%
v	551223	2.1%
w	1087389	4.1%
x	739689	2.8%
y	144198	0.5%
z	269943	1.0%