### Database Schema:
CREATE TABLE PaperAuthor (
	PaperId	INTEGER	NULL,
	AuthorId	INTEGER	NULL,
	Name	TEXT	NULL,
	Affiliation	TEXT	NULL,
	foreign key (AuthorId) references Author (Id),
	foreign key (PaperId) references Paper (Id)
);

CREATE TABLE Author (
	Id	INTEGER	NULL	PRIMARY KEY,
	Name	TEXT	NULL,
	Affiliation	TEXT	NULL
);

CREATE TABLE Paper (
	Id	INTEGER	NULL	PRIMARY KEY,
	Title	TEXT	NULL,
	Year	INTEGER	NULL,
	ConferenceId	INTEGER	NULL,
	JournalId	INTEGER	NULL,
	Keyword	TEXT	NULL,
	foreign key (JournalId) references Journal (Id),
	foreign key (ConferenceId) references Conference (Id)
);

CREATE TABLE Journal (
	Id	INTEGER	NULL	PRIMARY KEY,
	ShortName	TEXT	NULL,
	FullName	TEXT	NULL,
	HomePage	TEXT	NULL
);

CREATE TABLE Conference (
	Id	INTEGER	NULL	PRIMARY KEY,
	ShortName	TEXT	NULL,
	FullName	TEXT	NULL,
	HomePage	TEXT	NULL
);

### User's Query:
Within the year of 2001 to 2010, find the paper published rate of 2001.

### Extra Knowledge:
year of 2001 to 2010 refers to Year BETWEEN 2001 AND 2010; Percentage = Divide(Count (PaperId(Year = 2001)), Count (PaperID(Year BETWEEN 2001 AND 2010))) * 100
SELECT CAST(SUM(CASE WHEN Year = 2001 THEN 1 ELSE 0 END) AS REAL) / COUNT(Id) FROM Paper WHERE Year >= 2001 AND Year < 2011