1000 
1000
400
100
+51
San Francisco befor and now.
1
2
1
2
Wiedza
3 m
14
1000
1000
400
100
+84
1
1000
1000
400
100
+55
1000
1000
400
100
+35
1000
1000
400
100
+29
1000
1000
400
100
+113
1000
1000
400
100
+68
1000
1000
400
100
+110